SU1266007A1 - Code converter - Google Patents

Abstract

The invention relates to computing. Its use in data transmission equipment allows to increase the reliability of operation. The code converter contains two triggers, two EXCLUSIVE OR elements and two delay elements. The introduction of the OR element, the third delay element, and the five NAND elements ensure the synchronization of the converter after the first transition of the logical states of the input signal in the Manchester code. 2 Il.

Description

Yu

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about

This invention relates to computing technology and can be used in data fault finding equipment.

The purpose of the invention is to increase the reliability

functioning.

FIG. 1 shows a functional diagram of the device; On fn.2 - time diagrams of the work of the converter.

The code converter contains the nerve 1 and second 2 elements EXCLUSIVE OR, the nerve 3, the second 4 and the third 5 delay elements, the element OR 6, the first 7 and the second 8 triggers from the nerve elements N-NE 9-13, input 14, and also informational 15 and clock 16 outputs. The code converter works as follows.

The data in the Manchester code (Fig. 2 a) is inputted to the input 14 of the transducer, shifted on element 4 by delays by 1/4 clock interval (Fig. 2 6) and modulo two with the input data on the element EXCLUSIVE OR 2. The received pulses ( Fig. 2 c) are combined on the OR 6 element with the delayed element 5 delayed by 1/2 clock interval (Fig. 2 d). The received impulses come to the first trigger 7, which works as a frequency divider by two. Clock pulses are generated at the forward or reverse output of the trigger 7 (Fig. 2 d, e). If at the moment of switching on the device on the output of the E-Element I-HE 9 there is a „Yugichesk“ 1.

"Oh, then the pulses from the direct output of the trigger 7 pass to the output of the element I, -NON 1 1 (Fig. 2 d), since this element is open on the first BXOZW. At the output of the element AND-NO 12 at this time there is a logical "1 (figure 2 and), since the first input of the element AND-NO 12 is open.

As a result of multiplying and inverting the signals from the AND-HE elements 11 and 12 (Fig. 3, I), the clock impulses are produced at the output of the IS-HE element 13 (Fig. 2k). When at the input 14 of the converter, the logical sequence "O changes to a logical" 1 and ш, on the contrary, at the output of the EXCLUSIVE OR 1 element, the module adds two input signals with signals shifted by the delay element 3 relative to the input pa 1/2 of the clock interval, An inverted pulse is produced in a ripple of 1/2 a clock interval (Fig. 2 g). When this pulse is ionized, the logical inputs are set at the inputs of the AND-HE elements 9 and 10 at their outputs. Therefore, at the inputs of the element NE-13, the elements AND-NOT 11 and 12 pass both clock pulses and inverted clock pulses. E5, the result of multiplication and inversion at the output of the NAND 13 element is set to the logical "1 (Fig. 2k). After the termination of a pulse with an elemept EXCLUSIVE OR 7 on

the outputs of the elements AND-NOT 9 and 10 after installing; 1)) hardware. juicy elements, and therefore the nerve impulse from the right or inverse trigger output 7, passed through the AND-NO element

1 1 or 12, respectively, closes the element AND-NOT 9 or K) via the third input, setting the logical level “1. As a result, the element AND-NOT 10 or 9, respectively, opens to the third input, and at its output, H | jHcyTCTByeT

logical level “О, which closes the element AND-NOT 12 or 11, respectively. Therefore, a clock pulse with a rotary logical < 1 > in the first half of a half-cycle (Fig. 2k) passes through the output of the element NE-13. These signals go on the clock output 16 and on the input input sync of the trigger 8. On the ins | 50rmayioyny input of the trigger 8 there are no input data from input 14 of the converter. From the output of trigger 8 to the information output 15 of the transducer, the value is set to 1 in a code without returning to the memory. Thus, the code converter saves decoding after the initial change of the ram in the transmitted BVN signal, i.e. the first transition of the logical states of the input sigia.1a in the Manchester code.

Claims (1)

Invention Formula Code reaver. А, containing the first and second triggers, the first and second EXCLUSIVE OR elements, nerve and second elements, and information input of the second trigger ;; combined with the first input of the first element EXCLUSIVE OR and the input of the delay element and its keys to the driver's drive, the input of the second delay element is connected with the first input of the second power; e 1 EXCLUSIVE OR, the outputs of the first and second elements of the delay are connected to the second inputs of the corresponding elements EXCLUSIVE THE SINGER Io1I, the output of the second trigger in / 1 and the formation of a single output by the transformations-angel, characterized in that, for the purpose of controlling the output, in order to achieve an output, which is different in that, in order to achieve 1, the output will be applied. the third delay element, the OR element and the five NAND elements, the output 5 of the first element of the EXCLUSIVE OR connection1 with the first inputs of the nerve and the second element of the NE-NE, which it has sat down, does not correspond to the input of the third input and the second input of the fourth and second input) of the nerve E. ; And I-HP, the inputs of the first and second delay elements are combined, the output of the second element is EXCLUSIVE OR not connected to the first input and, through the third element, to the second 5 to the input of the OR element, the output of which is connected to the input of the first trigger, the direct and inverse outputs of which are connected to the second inputs of the third and fourth AND-NOT elements, respectively, whose outputs are connected respectively to the first input of the fifth and third inputs of the first AND-NOT elements to the second entrance of p and to the third input of the second NAND element, the output of the fifth NAND element is connected to the synchronization input of the second trigger and is the clock output of the converter.