SU1372624A1 - Code converter - Google Patents

Abstract

The invention relates to computing. Its use in information transmission systems simplifies the device. The code converter contains a delay element I, trigger 2, and elements EXCLUSIVE OR 3 and 4. Thanks to the appropriate connections, the code converter provides decoding of the Manchester II code and the selection of clock pulses and thus has a simpler implementation than the prototype. 2 Il.

Description

Rig. f

The invention relates to computing and is intended for use in information transmission systems.

The purpose of the invention is to simplify the converter.

Figure 1 shows the functional diagram of the Converter; figure 2 timing diagrams of his work.

The code converter contains the element 1 delay, trigger 2, the first 3 and second 4 elements EXCLUSIVE OR.

The delay of element 1 at the first output lies within the limits of the sum of the delays in trigger 2 and the first element EXCLUSIVE OR 3 to the same amount plus the clock interval. The delay of element 1 on the second output may lie within the limits of the delay in element 3 plus half of the clock interval to the value of the delay in the element plus the clock interval.

The code converter works as follows.

At the input 5 of the Converter receives the Manchester II ir code (Fig.2a), corresponding to the logical information (Fig.26). Element 1 delay delays the input data (figv). The EXCLUSIVE OR 3 element modulates the two signals at its inputs (FIG. 2d). Trigger 2 clocks this input with this signal. Thus, at the direct output 6 of trigger 2,

data in the code without returning to zero (BVN) with a delay equal to the signal delay in blocks 2 and 3 plus 1/2 clock interval (fig.2d).

The element EXCLUSIVE OR 4 sums modulo two signals at its inputs and at its output 7 there are clock pulses (Figure 2e).

Thus, the proposed code converter decodes the Manchester II code into the BVN code and extracts clock pulses having a simpler implementation than the known one.

Claims (1)

Formula of the invention A code converter containing the first EXCLUSIVE OR element, the first input of which is combined with the input of the delay element and is the input of the converter, the first output of the delay element connected to the first input of the second EXCLUSIVE OR element, and A trigger whose direct output is the first output of the converter, characterized in that, in order to simplify the converter, the second code of the delay element and the stroke of the first element EXCLUSIVE OR is connected respectively to the information input and the trigger synchronization input, the inverse output of which is connected to the second inputs of the EXCLUSIVE OR elements, the output of the second element EXCLUSIVE OR is the second output of the converter.