Datasheet

Specifications for Transistorized General-Purpose Analog Computer

This 11-page EAI bulletin (No. PS62008-1) is a formal procurement specification for a transistorized general-purpose analog computer intended for desktop use. It covers detailed technical requirements for all major subsystems including up to 48 operational amplifiers, 40 integrator channels, 60 potentiometers, quarter-square multipliers, variable diode function generators, X2 and log-X diode function generators, comparators, function switches, pre-patch panel, reference supply, repetitive operation capability, and patching kits. Key accuracy and performance requirements are specified throughout, such as 0.01% amplifier accuracy, 350 kHz bandwidth, 20 ms to 500 ms solution time range, and plus-or-minus 10 volt reference supplies at 250 milliamperes.

Manufacturer: EAI
Type: Datasheet
Language: English
Learning track: machine reference
Pages: 11
Credit: Bulletin No. PS62008-1. Published by Electronic Associates, Inc., Long Branch, N.J.

EAI
procurement specifications
transistorized analog computer
computing components
operational amplifiers

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1.1 1.10 1.11 1.12 1.13 1.14 1.15 1.16 1.17 1.18 1.19 PRINTED IN USA EAI- ELECTRONIC- RSSOEIETES GMBi : SSE “ €-FRONTC KSSUCTATES: IN C,, Long Branch, N.J. SPECIFICATIONS FOR TRANS ISTORIZED GENERAL -PURPOSE ANALOG COMPUTER Reliability, accuracy, and operating convenience shall be paramount considerations in the design of the equipment comprising the computer as outlined herein. The computer is to be ‘completely transistorized to insure the best reliability, stability, and extreme compactness. So that it shall be suitable for desktop use, the computer, when fully expanded, shall weigh no more that 330 pounds and shall be no greater in size than 20 inches in width, 25-3/8 inches in height, and 43-3/16 inches in length. One each computer in accordance with Section 2. (Up to 48) operational amplifiers in accordance with Section 3. (Up to 40) integrator channels in accordance with Section 4. (Up to 60) precision potentiometers in accordance with Section 5. (Up to 23) multipliers in accordance with Section (Up to 5) variable diode function generators in accordance with Section ° (Up to 23) wnipolar X* diode function generators in accordance with Section : (Up to 23) unipolar Log X diode function generators in accordance with Section r (Up to 24) comparators in accordance with Section (Up to 5) function switches in accordance with Section __ One each digital voltmeter in accordance with Section 2.3.7. One each reference supply in accordance with Section 2.9. One or more patching kits in accordance with Section sy. Extended pushbutton readout system in accordance with Section ReBed0 One or more pre=patch panels in accordance with Section 2.6, One each reference supply in accordance with Section 2.9. One each power supply in accordance with Section 2.10. Une each service shelf in accordance with Section 2.8. 1.20 One each centrally located visual overload alarm system in accor- dance with Section 16. 1.21 High speed repetitive operation mode in accordance with Section 2.7. 2. SOMPUTER This will contain the following features: 261 The computer shall be pre-wired to accommodate up to forty-eight operational amplifiers and sixty precision potentiometers. It shall also be pre-wired to accept the following additional computing components. 20101 (Up to 40) integrator channels. aster (Up to 23) quarter-square multipliers in accordance with Section__. Zales (Up to 5) variable diode function generators. Rath (Up to 23) X* diode function generators. Ralsd (Up to 23) Log X diode function generators. 26126 (Up to 24) comparators. 202 ontro Benet Mode Selection--The following computer mode controls shall be avail- able at the computer control panel. Redelet Reset--This mode shall restore problem to initial conditions. Reeeled Hold--This mode shall hold problem solution. 2e2e1-3 JYperate--This mode shall place computer in operate condition. 2e2el eh Pot-Set--This mode makes reference available to the top of all ground- ed pots, shorts amplifiers and connects digital voltmeter to selector output. 2020165 Slave--This mode makes computer mode slave to the signals coming in via the slave connector. Rene liso Repetitive Uperation——Places the entire computer in repetitive operation when integrator networks are patched normally. C JR_TRANSISTORIZED — Conti 2.3 Controls eet Readout--The following component outputs shall be selectable by push- button at a centrally located pushbutton matrix for readout on the voltmeter or electronic digital voltmeter at the operator's choice. Pushbuttons shall be arranged in two columns so that the actuation of one button in each column will accomplish a selection when either the "A" button or the "P" button is also actuated. The control panel and pushbutton marking system shall correspond with the patch panel mark- ing so that no code need be remembered by the operator. Reoelet Amplifier Outputs--(50 when A button is depressed) 35122 Potentiometer Coefficients (60 when P button is depressed) Zc3e1<S Trunks (Incoming 15 when A button is depressed) 203-8 Readout in accordance with the above shall be included for all such components supplied. Provision shall be included for read- out of all such components that may be added at a future date in order to make up a fully expanded console. 2.323 Readout Panel--A readout panel shall be provided on every patch panel. It shall provide access to: (a) The output of the signal selector (SEL). (b) Input to the digital voltmeter. (c) Input to the voltmeter. (ad) Output to a vertical and horizontal oscilloscope sweep. This panel shall make possible connections to connectors at rear of computing consoles for X-Y plotters, strip chart recorders, and ten cross computer trunks. 20304 Control panel of console shall contain a voltmeter which shall be a precision multi-range meter for the monitoring of amplifier outputs, input trunks, and power supply voltages, which shall also be capable of being used for the balancing of operational amplifiers. Five meter ranges shall be selectable by a rotary switch. A voltmeter selector switch will also be available which shall select all power supply voltages for readout on the voltmeter. PRE RS) A centrally located visual overload indicator shall be available on the control panel which will immediately identify any amplifier which is in an overload condition. } 2.3.6 A pushbutton power switch illuminated by light when in the "Un" position shall be available on the control panel which will allow control of primary power to the computer. 2.3.7 A completely transistorized digital voltmeter shall be provided on the control panel for the precise, rapid, digital readout of -3- CS. FOR TRANSISTORIZED GENERAL-PURPOSE COMPUTER — Co e nN R 2.5 2.6 2.6.1 2.6.2 26.261 2.6s2e0 26.263 2.6.2.4 2.6.2.5 2.6.2.6 2.7 computing voltages. This voltmeter shall offer a four-digit display and polarity from 10 millivolts to +11.99 volts DC with fixed decimal ~~ point. This voltmeter shall give readings accurateto +0.1% and +1 digit over the entire reading range. It shall have a high brilliance optical projection system to display reading, sign and decimal point. Console Construction--All power supply voltages to be supplied to amplifiers and other computing components via bus bars, e.g., it shall be possible to remove any power supply voltages from any amp- lifier by merely unplugging the proper taper pin from a bus bar carrying that voltage behind the amplifier chassis. All operational components and power Supplies are to be of a plug- in type. Pre-Patch Panel Construction The computing console shall accept a removable pre-patch panel. All computing components shall terminate inputs and outputs on this pre- patch panel. The design of the pre-patch board and the grouping of components shall be such as to allow the maximum use of bottle plugs to reduce pre-patch panel clutter to a minimum. Construction shall be such as to eliminate possibility of "open" connections due to loose or partial insertion of patch cords. The pre-patch panel shall be con- structed so that it can be modified to conform to changes in the number and type of computing components in the computing console. This shall be ~~ accomplished by adding or replacing component blocks on the pre-patch panel as required by the new computer component configuration without any changes or additions to systems wiring. The pre-patch panel shall be at least twenty-nine inches in width and twenty-two inches in height in order to allow the programmer proper access to, and vision of, the pre-patch panel connections. Color=coding of pre-patch panel—-To be color-coded as follows ««. Green=—input Red——out put Yellow--potentiometer Black—-ground White-—-integrator networks Tan--switching and non-linear components High speed repetitive operation system. SPECS, FOR TRANSISTORIZED GENERAL-PURPOSE ANALOG COMPUTER — Continued 2.701 Zwlve 2-7-3 2074 2.755 2.7.6 2.7.7 2.8 2.804 2.9 R91 29.3 2.94 29 AS: Shall permit computer to be operated in either real time or high speed repetitive operation. Shall be capable of producing compute times from 20 to 500 milli- seconds per solution. Keset time shall be ten milliseconds. The HSRKU shall be capable of cycling solutions at least 33 times a second. Shall have switch control of solution times at fixed values of 20, 50, 100, and 200 milliseconds per solution. Vernier control to obtain solution times between fixed values shall also be available. Timing unit shall be completely solid state. Shall have "slave" system to allow control of two or more computers in either real time or repetitive operation mode. Shall have automatic time scale change of 500 to 1 from real time to repetitive operation which may be accomplished simultaneously on all integrators from mode control buttons on control panel. Shall utilize high speed electro-mechanical relays to cycle com- puter between reset and operate modes. Service Shelf Shall permit convenient maintenance of computing components under normal operating conditions. Reference Supply System Reference supplies of plus or minus 10 volts and 250 milliamperes capacity shall be furnished. Terminations for plus and minus reference shall be provided on the pre-patch panel. The noise on either positive or negative reference voltages shall not exceed 300 microvolts RMS. The balance between positive and negative reference voltages shall be adjustable to +0.01% or better. The long term stability of this balance shall be * +0.0024/°F or better. The absolute value of the reference voltage shall be adjustable to +.05% or better. The long term stability of this absolute value shall be +0.0034/ F or better. * Note items specified in % per degree F. PECS 2.10 2.10.1 2.10.2 z ISTORIZED PURPOSE ANALOG COMPUTER — Conti Power Supply A transistorized power supply shall be furnished which is capable of operating from line voltages of 100 to 125 volts, 50 to 60 cycles per second within the accuracy specifications of the computing com» ponents. This supply shall have sufficient capacity to supply necessary power to the computer when it is fully expanded. 3+ AMPLIFIER 3.1 3.2 3.3 34 3.5 3.6 3.7 3.8 3.9 3.10 3.11 All operational amplifiers shall be uncommitted. That is, shall be capable of being used as either integrators, summers, or high gain amplifiers in conjunction with multipliers and function gen- erators, depending on the patching utilized. Each amplifier shall have an overload indicator tied to an individual, centrally located, visual overload indicator located on the computer control panel which will indicate excessive departure of the summing point voltage from zero. The amplifiers shall be packaged in identical interchangeable amp- lifier modules, each consisting of two transistorized D.C. ampli- fiers terminated on the patch panel as high-gain amplifiers. Com- panion networks, consisting of input and feedback resistors matched to 0.01% accuracy shall be terminated in the module so that the ampli- fier may be converted to inverter or summer operation by bottle plugs. The amplifier shall be connected to its pre-patch panel connections at all times except in the pot-set mode at which time a short shall be placed on the amplifier internally. Output current shall be 20 milliamps at plus-minus ten volts. Bandwidth of a standard 10K-10K inverter shall be 350 KC typically. Phase shift of a standard 10K-10K inverter at twenty volts peak-to- peak and 1000 CPS shall be no more than 0.15°. The dynamic amplitude error of a standard 10K-10K inverter at ten volts peak-to-peak at 1000 CPS shall be no greater than 0.1% maximun. The amplifier offset temperature coefficient for a unity gain inverter with 10K resistors shall be plus or minus 0.5 microvolts per degree fahrenheit. Peak noise and ripple standard 10K-10K inverter 100Q.V peak typical. All amplifiers shall be individually chopper stabilized. -6- es C F ISTORIZED UR AN OMPUTER — Conti 4. INTEGRATOR NETWORK Aol 4.2 43 44 45 4.6 4.7 The integrator network shall, when used with high gain amplifiers, provide two integrator channels. The network pre-patch module will be so designed as to permit the use of a bottle plug to make all nec- essary connections with the high gain amplifier to form an integrator channel. Shall contain all relays necessary for switching the integrator to reset, hold, operate modes of operation. Shall have available "IC" termination for introducing initial condi- tions other than zero directly into the integrator for both "real time" and "repetitive operation" modes. No additional amplifiers shall be required when in repetitive operation mode. Individual integrator 10 to 1 time change shall be accomplished by bottle plug patching in either "real time" or high speed repetitive operation. Precision +0.05% polystyrene capacitors shall be used for real time, adjustable for repetitive operation. Shall be capable of time scale change of 500 to 1 between "real time" and "repetitive operation" modes. Shall have patching terminations available to allow control for each dual unit of mode of operation. 5. POTENT IOMETERS 5-1 562 5-3 D4 505 Shall be 10 turn, 5000 OHM wirewound potentiometers individually fused and equipped with calibrated adjustment knobs. The potentiometers shall be mounted in groups of five on the front of the computer console and shall be immediately accessible to the opera- tor. (The mounting of potentiometers on sliding trays, which do not allow immediate access to all potentiometers, shall not be acceptable.) The high end and arm of four potentiometers in each group shall be ter- minated on the patch panel with low ends grounded. The fifth potenti- ometer shall be terminated on the patch panel with the low end un- grounded. All inputs shall be uncommitted. Resolution shall be .025% typical. When the computer is in the "Pot-Set" mode, relays within the module o1 02 3 1 02 4 shall place reference on the high end of the four grounded pots and the arms shall be connected to the readout selector system. In any other mode just the arms of all five potentiometers shall be available for readout selection. QUARTER-SQUARE MULTIPLIERS (Type 7.099) Shall be a completely solid state unit which is capable of producing a product of two input variables of either polarity. It shall also be capable of performing the operations of division, squaring and square root. The maximum static multiplying error shall not exceed plus or minus 0.4% full scale (20 volts full scale). Phase shift shall be less than 0.28° when multiplying plus or minus ten (10) volts DC by twenty (20) volts peak-to-peak at 1000 CPS. The maximum dynamic amplitude error when multiplying plus or minus ten volts DC by 20 volts peak-to-peak at 1000 CPS shall be +0.25% of full scale. QUARTER—SQUAPE MULTIPLIER (Type 7.096) Same format as 7.099 with appropriate specifications. Static eeeceeveeceaeeeeneeeneeeeoeene +0.1% of full scale TOOO~ cccccveccscccecceceseses O.28° maximum-phace shift +0.25% of full scale maximum dynamic amplitude error VARIABLE DIODE FUNCTION GENERATORS Each diode function generator shall be capable of generating a single 19-segment or two independent 10-segment functions when used in con= junction with amplifiers. Shall incorporate single turn carbon potentiometers for slope adjust- ments. Maximum slopes for each 10 segment section shall be as follows: Segment No. 1 .sececeseseees at least 4 volts/volt (slope at the origin) Segment Nos. 2 through 10 .. at least 1 volt/volt Frequency response shall be compatible with associated amplifier. OR T IstOR AN. ULER — Conti 5 Noise shall be less than 1 millivolt RMS. X* DIODE FUNCTION GENERATOR 1 Shall be a dual fixed diode function generator composed of completely solid state components. 02 One dual unit shall be capable of the following operations: A. When gperated in combination with an operational amplifier it will yield an X* output for X of one polarity. B. When operated in coe oe with gewo operational amplifiers, it will deliver outputs of (X, )* and (X5)“ when both Xj and X2 are uni- polar and of opposite aign C. When operating in combination with two operational amplifiers it will deliver an output of X* with the input X varying both plus and minus in sign. D. A square root output may be obtained by using the X* DFG in the feedback of an operational amplifier. ) Shall accept inputs from plus to minus ten volts and provide outputs from plus to minus 10 volts. 4 Frequency response shall be compatible with associated amplifier. + Total error at 5.0 CPS shall be plus or minus .2% full scale typi- cally and plus or minus .4% full scale maximum. LOG DIODE FUNCTION GENERATOR ot Shall be a dual diode function generator composed of completely solid state components. o2 Each dual unit shall be capable of the following operation when used in conjunction with operational amplifiers. A. Output of LogyoX for an X input of one polarity. B. Outputs of Log;oX4 and LogyQX2 when inputs Xj and Xp are unipolar and of opposite sign. C. An exponential output when the Log DFG is used in feedback of high gain amplifier. 3 Shall accept inputs from plus to minus ten volts and provide outputs from plus to minus ten volts. 4 ) o1 02 3 4 25 7 1 02 o1 o1 Frequency responseshall be compatible with associated amplifier. Log X, actual input deviation from theoretical input for a given out- put shall be plus or minus 0.5% F.S., typical. COMPARATOR The comparator module shall contain two separate comparator channels each with a double=pole, double—throw relay. Each channel shall com pare a variable input voltage to an arbitrary fixed voltage and cause a switching operation to be performed. Each comparator channel shall contain at least one double-pole, double- throw relay. An amplifier shall be furnished as a part of the comparator. Each comparator shall have an input range of plus ten to minus ten volts. Switching time shall be no greater than 10 milliseconds maximum. Sensitivity (minimum change in input voltage required to cause switch- ing action in either direction) shall be no greater than 3 millivolt. The relay contacts shall be capable of handling at least 2 amperes at 24 volts for non-inductive loads. FUNCTION SWITCHES Shall be single-pole, double-throw center off switches for performing manual switching operations. Switch contacts shall be capable of handling at least 2 amperes at 24 volts for non—inductive loads. TRUNK GROUP Shall provide 15 patch panel terminations for rear connected inter- console trunking cables. PATCHING KITS Patching kit shall include the following’ 20 each patch cords, 6 inches long; Color: Black 30 each patch cords, 12 inches long; Color: Brown 20 each patch cords, 18 inches long; Color: Orange -10- SPECS. FOR TRANSISTORIZED GENERAL-PURPOSE ANALOG COMPUTER — Continued 10 each patch cords, 30 inches long; Color: Blue 30 each bottle plugs, 2 prong horizontal 32 each bottle plugs, 4 prong 8 each bottle plugs, 6 prong "I" (For connecting integrator networks) 2 each Multiple blocks (For off-the-panel tie points) Bulletin No. PS62008-1