SU1674130A1 - Modulo three convolver - Google Patents

Abstract

The invention relates to a technique for transmitting information with hardware control and can be used to communicate a computer with peripheral equipment. The aim of the invention is to increase the reliability of the device. The device contains four elements AND, two elements NOT, two elements 2I-OR-NOT, three triggers. The goal is achieved by the fact that the convolution of modulo three is carried out not on counters with subsequent decoding of the result, but with the help of a combinational circuit and two D - triggers. 1 ill., 1 tab.

Description

The invention relates to the field of information transmission with hardware control and can be used to connect a computer with peripheral equipment.

The purpose of the invention is to increase the reliability of the device.

The drawing shows a functional diagram of the device.

The device contains an element And 1, trigger 2, elements NOT 3, 4, elements And 5, 6, elements 2I-OR-NOT 7, 8, triggers 9, 10, element 11, outputs 12, 13, information input 14, clock input 15, installation input 16.

The device works as follows.

The setup impulse from the device input 16 transfers the triggers 2, 9, 10 to the initial state and at the outputs 12. Device 13 will be code 00.

With the arrival of the first (odd) clock pulse from the input 15 of the device, the trigger 2, operating in the counting mode, will go into one state, which will allow the information to pass through the And 5 element.

Single information received from the input 14 of the device simultaneously with the first clock pulse, through the elements 1,3,4, 5 will pass to the second input of the first element I1 of element 7 and to the second input of the second element I of element 8.

The information on the information input of the trigger 9 passes through the first elements of AND 7, so (at the first input of the first element AND of element 7, the resolving potential comes from the output of the element 11, and the trailing edge of the pulse from the output of the element HE 3 is written to the trigger 9.

Information on the information input of the trigger 10 through the element 8 will not pass, since the first input of the second element And element 8 receives the inhibitory potential from the inverse output of the trigger 9.

Thus, at the outputs 13, 12 of the device after the first clock pulse will be code 01.

If during the first clock pulse the information at input 14 is zero, then at the end of the clock pulse the state of the flip-flops 9, 10 will not change and

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Outputs 13, 12 of the device will save code 00.

In accordance with rows 2-6 of the table, the device will generate the result of the convolution modulo three depending on the tact (even or odd) the single information comes in and in what state (single or zero) the triggers 9, 10 were located. 3 and 4 are needed to confidently record the result in triggers 9 and 10.

Thus, the modulo-three convolution device compared with the prototype has no malfunctions.

Claims (1)

The invention includes a device for modulating convolution three, containing three elements And a first trigger, the first input of the first element And being connected to the information input of the device, the second input connected to the synchronous input of the first trigger and connected to the clock input of the device, direct output the first trigger is connected to the first input of the second element And, the inverse output to the first input of the third element And and the information input of the first trigger, the reset input of which is connected to the set-. The main input of the device is characterized in that, in order to increase the reliability of the operation, two NOT elements are introduced into the device, two II-OR-NOT elements are inserted. the second and third triggers, the fourth And element, and the output of the first element And through the first element is NOT connected to the synchronous inputs of the second and third triggers, the output of the first element is NOT through the second element NOT with the second inputs of the second and the third elements And the outputs of which are connected respectively with the first and second inputs of the elements 2I-OR-NOT. the outputs of which are connected to the information inputs of the second and the third trigger, the setup inputs of which are connected to the setup input of the device, the inverse output of the second trigger is the youngest bit of the information output of the device and is connected to the third input of the second element 2I — OR — NOT; the inverse output of the third trigger is the highest bit of the information output of the device and is connected to the third input of the first element 2I-OR-NOT, the direct outputs of the second and third triggers are connected to the first and second inputs of the fourth And element, the output of which is connected to the fourth inputs of the 2I-OR-NOT elements. with. Jg S-x I  lofr "I" a -I S J  t I  a ± "M o " I S "a