SU742936A1 - Optronic adder - Google Patents

Description

The invention relates to computer technology and can be used in the construction of optoelectronic arithmetic devices operating in an arbitrary number system.

A known optoelectronic adder, ⁵ operating in an arbitrary number system and containing two orthogonal bus groups, connected to the corresponding inputs, and film photoconductors with nicknames installed in each node of the two-coordinate grid [1 ^.

However, the use of electroluminescent and liquid crystal layers as emitters does not allow to achieve high performance.

In addition, each digit of the adder contains a large number of conclusions (for the base of the number system

P = 10 the number of conclusions 1.0 + 10 = 20), „which reduces the reliability.

A known optoelectronic adder containing cascade-connected discharge cells on photocells, optically coupled to the register of terms and allowing to indicate the calculation result [2 ?.

This adder performs the operation of adding numbers and indicating the result in binary code, which is very inconvenient for the operator.

Also known is an optoelectronic adder containing an input unit, light emitters, modulators, photodetectors, transfer pulse shapers, delay elements and optoelectronic modules that are optically coupled through their first inputs through light emitters to the input unit, second inputs are connected to the modulator outputs, and optical outputs of the optoelectronic modules through photodetectors, transfer pulse shapers, and delay elements are associated with high-order light emitters [3].

A disadvantage of the known optoelectronic adder is that the addition operation time due to the delay of the signal of units over 742936 before the input of the discharge cell of the highest separation in each category depends on the number of bits of the terms in the case of through transfer of overflow units. The closest technical solution to the invention is an optoelectronic adder containing a term input unit, the outputs of which are connected to the corresponding inputs of the adder discharge cells, each of which contains a light emitter, a modulator, a transfer signal shaper, and an optoelectronic quantizing module, the first optical input of which is connected to the first b | [the path of the light emitter, the second output of which ₁₅ is connected to the first input of the module, the output of which is connected to the electrical input of the optoelectronic module, the bit outputs of which form the result of the summation. 20 The aim of the invention is to simplify and increase the speed of the optoelectronic adder.

This is achieved by the fact that in an optoelectronic adder containing a term input unit, the outputs of which are connected to the electrical inputs of the adder discharge cells, each of which contains a light emitter, a modulator, a transfer signal shaper, and an optoelectronic quantizing module, the first optical input of which is connected to the first output a light emitter, the second output of which is connected to the first input of the modulator, the output of which is connected to the electrical input of the optoelectronic quantizing module, in each of its discharge cells, in The output of the optoelectronic quantizing module is connected to the first optical input of the transfer signal generator, whose electrical input is connected to the modulator output, the second optical input of the transfer signal generator is the first optical input of the discharge cell, and the optical output is the first optical output of the discharge cell, and the second optical inputs of the modulator and the optoelectronic quantizing module are connected to the second optical input of the bit ⁵⁰ cell, the input of the light emitter is the electrical input of this bit cell, and the third light-emitter output — by the second optical output of the discharge cell, ₅₅ wherein the first optical input and output of the low-order discharge cell are respectively associated with the second optical output and the second optical row; in addition, in the optoelectronic adder, the optoelectronic quantizing module contains optically coupled regenerative optocouplers and a zero-setting unit, the optical input of which is connected to the optical output of the regenerative optocoupler of the highest category, the electrical input is connected to the first electrical input of each regenerative optocoupler and connected to the electrical input of the optoelectronic quantizing module and the electrical output of the zero-setting circuit is connected to the second electrical inputs of all regenerative optocouplers bit line, with the optical input of the regenerative optocoupler of the least discharge being the first and second optical inputs of the optoelectronic quantizing module, the optical outputs of the regenerative optocouplers are the discharge outputs of the optoelectronic quantizing module, and the optical output of the regenerative optocoupler of the highest category - the optical output of the optoelectronic quantizing module; The regenerative optocoupler in the optoelectronic adder is made in the form of a direct current amplifier with a resistor in the feedback circuit, the input of which is connected in series through the on-board diode and the first photodiode to the first electrical input of the optocoupler, the second electrical input of which is connected through the second photodiode in the forward direction with the input of a DC amplifier, the output of which is connected in series through a load resistor and an LED turned on in the forward direction, connected to the zero bus potential, moreover, the optical input of the first photodiode is the optical input of the regenerative optocoupler, the second photodiode is optically coupled to an LED whose output is the optical output of the regenerative optocoupler.

In FIG. 1 shows a functional diagram of the adder; in FIG. 2 is a schematic diagram of an optoelectronic quantizing module.

The optoelectronic adder contains (see Fig. 1) optoelectronic quantizing modules 1, which are optically coupled by inputs 2 through light emitters 3 to the term input unit 4. Electrical inputs of 5 optoelectronic modules i 1 are connected to the outputs of 6 modulators

742636

7, the inputs 8 of which are optically connected to the outputs of 9 light emitters 3. The inputs »10 of the transfer signal generation blocks 11 are optically connected to the optical outputs of 12 optoelectronic modules 1, 5 inputs 13 are optically connected to the outputs of 14 light emitters 3 of the corresponding high-order bits, and the inputs 15 are connected to the outputs of 6 modulators 7. The outputs of 16 blocks of the formation of the transfer signal ¹⁰ are optically coupled to the inputs of the optoelectronic modules 1 and the inputs of 8 light emitters 7 of the corresponding senior bits of the optoelectronic adder.

In FIG. 2 shows regenerative optocouplers of the junior 17 and senior categories 18, a zero-setting circuit 19, the first 20 and second 21 electrical inputs of the regenerative optocouplers 17 and 18, ^{20, an} electrical output 22 of the zero-setting circuit 19; each regenerative optocoupler 17 and 18 is made in the form of a DC amplifier 23 with a resistor 24 in the feedback circuit, a diode 25, a first photo- ²³ diode 26, a second photodiode 27, a load resistor 28 and a LED 29.

Optoelectronic adder operates as follows.

It is advisable to consider the operation of the adder — ³ θ, using the example of addition of decimal numbers A = 358 and B = 543.

When the first term A is applied, the signals taken in parallel from the input unit 4 excite the light emitters 35 for a time corresponding to the value of each digit of the term A. The output light fluxes of the light emitters 3 act simultaneously on the corresponding inputs 2 of the multifunctional optoelectronic modules 1, inputs 8 of the modulators 7 and inputs 13 blocks 11 forming a transfer signal. Under the influence of the light flux, the modulators 7 increase the voltage at the outputs 6 to the excitation voltage of the multifunctional optoelectronic modules 1 n blocks 11 of the transfer signal generation. The number of excited light outputs of the multifunctional ⁵⁰ optoelectronic module 1 of each discharge corresponds to the time spent in the excited state of the corresponding light emitter 3. After the termination of the supply of the digits of the term A, the light emitter ⁵⁵ fades 3, which leads to the disappearance of the corresponding light fluxes, so the output voltage 6 the modulator 7 is set at the level of the fixing voltage, at which the recorded information can be stored in the optoelectronic modules 1 in the form

111111110, 111110000 111000000

The recording time of the number A, determined by the largest digit 8, is 8 77.

At the moment the term A is recorded, it is possible that the numbers of summand B begin to arrive and at the same time they are summed with the recorded numbers of summand A. In this case, the remaining unexcited outputs of quantizing module 1 are excited in the same way. As a result of the overflow of the first discharge, the corresponding module 1 gives an optical pulse to output 12, which is input 10 of the corresponding block 11 of the formation of the transfer signal for storage. At the same time, during a time equal to the duration of the optical pulse, module 1, where overflow occurred, self-resets. At this moment: time information in the adder will be presented

LLC 000 000 +1 overflow

111 111 100

111 110 000

This moment was recorded 2 77 after the start of the submission of the term B.

Self-zeroing during the time Τ 'of module 1, where the overflow unit occurred, does not prevent the remainder of the digit of the second term B from being written into it, since the resulting overflow unit is stored in the transfer signal generating unit 11 until the addition process is complete in the second (for the case described above) second digit of the adder. Transfer unit: it is stored in the transfer signal generating unit 11 because when added in the high order, the light flux from the output 14 of its light emitter 3 acts on the input 13 of the transfer signal generating unit 11 and prevents the transfer pulse from passing to the output 16. At the end of the summation in the second discharge information in the adder will be presented

100,000,000 + 1 overflow 111 111 111 111 111 100

This moment occurs through 277->

If the summation process in the senior (second) discharge is completed, the optical signal at input 15 disappears and at

7429 36 output 16 of the transfer signal generating unit 11 an optical pulse of duration / C will appear; which, acting on the inputs 2 and 8, respectively, of the module and modulator 7 of the senior (second) g discharge, increase the CDRF recorded in it by one. At the same time, the summation process will continue in those digits where it is not completed. Since in the above case a unit of 1G overflow occurs in the senior (second) category, the information in the optoelectronic adder will be presented at the moment in the form

100000000 1S

000000000 + 1 arrangements 111111110

The time spent on this addition step is Έ.

The resulting unit of overflow of the second 2f> discharge, since the summation process in the third category is completed, is transferred to the corresponding optoelectronic module 1 in time Ή „Finally we get ²⁵

100000000000000000 111111111

The total addition time of numbers A and B is 2T + 2T + = .1477 30 • Similarly, the process of sequential presentation of the terms and the formation of the resulting sum can be continued. The developed optoelectronic adder reduces the number of 35 equipment used. There are no delay elements of the transfer signals to 8F amplifiers-shapers and a number of logic elements.

In addition, the replacement of electrical connections for transmitting signals of transfer units optically reduces the power consumption of the device and increases the noise immunity of communication channels. At the same time, the speed of the optoelectronic adder was increased.

Claims (3)

1. USSR author's certificate number 473182, cl. G About F 7/56, 1975. 2.Lbtorskoe certificate of the USSR № 556438, cl. Q About F 7/56, 1977. 3. Mayor S. ACh Kozhem to V.P., Mesikin I.V., Natroshvili O.G. Computing units at the new basic opto-electrically operated modules of Kh.Sb. Computer Engineering, Penza, no. 6, 1976, p. 87-89.