SU970426A1 - Codegram receiving device - Google Patents

Description

The invention relates to computer technology and can find application in the construction of information-measuring systems used in industry and when performing scientific research.

A device for receiving codograms is known, comprising an input unit, a registration unit, three triggers, a | q counter, a delay element, two AND elements, four OR elements, two switches £ 1].

A disadvantage of the known device is the limited functionality and lack of reliability of reception.

The closest in technical essence to the proposed is a device for receiving codograms, containing a counter, the output of which is connected to the input of the registration unit, a distributor, the outputs of which are connected to the first inputs of the elements And the first group, a group of triggers, a generator, the second group of elements And, 25 the first element And, shift register, discriminator, second AND element, three OR elements, device inputs are connected to the second inputs of AND elements of the first group and the first inputs of triggers - 30 gers and And elements of the second group, second input and the outputs of which are connected respectively to the outputs of flip-flops and an OR gate through the first - to the first input shift register, the first output of generator is connected to the second inputs of flip-flops and shift register, the output of which is coupled through the discriminator to the first inputs of elements. And, the second inputs of which are connected to the corresponding outputs of the generator, the outputs of the AND elements through the second OR element are connected to the input of the distributor and the first input of the counter, the second input of which through the third OR element is connected to the outputs of the OR elements of the first group £ 2].

The disadvantages of the known device are the low reliability of receiving information, since the marker is not analyzed, and the complexity of the organization, since a multiphase generator is used, which also negatively affects the reliability when the frequencies leave.

The purpose of the invention is to simplify the device and its reliability.

This goal is achieved by the fact that in the device for receiving codograms containing a clock pulse generator, the output of which is connected to the first input of the first element AND the input block, the output of which is connected to the first input of the second element And the first input of the first trigger, the second trigger, the output of which 5 connected to the first inputs of the third and fourth elements And, accordingly, the shift register and counter, a delay element is introduced, the output of which is connected to the first input of the second trigger, the output of the first trigger is connected to the second the input of the first element And, the output of which is connected to the input of the delay element, the second inputs of the third and fourth, and th elements and the input of the counter, the output of which is connected to the second inputs of the first second second triggers ^ the output of the third element And is connected to the first input of the shift register and the second input of the second element And the output of the second and fourth elements And are connected respectively to the second and third inputs of the shift register.

The drawing shows a structural electrical diagram of the device.

The device contains an input unit ~ 1, triggers 2 and 3, a shift register 4, a clock generator 5, a counter 6, a delay element 7, elements 30 AND 8-11.

Generator 5 generates a train of pulses with a frequency of 100 Hz. Counter 6, trigger 3, delay element 7, elements And 10 and 11 composition-35 Lak ”t block 12 distribution of clock pulses.

Device; works as follows.

Upon receipt of the first code pulse dd sa from the output of the input unit 1, trigger 2 is triggered and the pulses of the generator 5 begin to arrive simultaneously through the element And 8. At the element 7 delays, the elements And 10 and 11 and the counter

6. All odd pulses pass through the And 10 element to even elements of the register 4, and even pulses pass through And 11 elements to the odd elements. When the last code pulse appears at the output of element And 8, the Stop pulse appears on the 50th output of counter 6, which sets the trigger to the 2nd stop position, clock pulses do not pass through the And 8 elements and the receiving cycle of the device ends.

Code pulses from the output of the input unit 1 are fed to the input ele. ment And 9, to the other input of which 60 receive odd clock pulses from the output of the element And 10, from the output of the element And 12 pulses arrive at the information input of the push-pull register 4. 65

Push-pull register 4 shift consists of elements divided into even and odd. For phasing code pulses of a signal with clock pulses of generator 5, the principle is used - the first clock pulse is always shifting. This principle allows, regardless of the phase relationship of the clock pulses, to record the first code pulse in the first element of the register 4 using the second clock pulse. Therefore, if the second clock pulse reads the first code pulse, then the next even clock pulse necessarily reads the second code pulse and writes it to the first bit of register 4. 'Other code pulses of the signal are recorded in the same way.' When the third and other odd clock pulses arrive, written in the odd elements of the register -4, is shifted to the even elements of the register 4.

Thus, the use of a delay element and a single-phase low-frequency generator 5 simplifies the device for receiving codograms, since there is no need to create a multi-phase master oscillator, divider, distributor, discriminator, memory unit, and the use of a clock distribution unit 12 and a push-pull register 4 increases the reliability of reception codograms by improving the common mode of the code pulses of the signal with the clock pulses of the generator.

Claims (2)

1. USSR author's certificate No. 636656, cl. C 08 C 19/28, 1976. 2. Authors certificate of the USSR .614459, cl. C 08 C 19/28, G 06 F 3/04, 1976 (prototype).