SU556443A1 - Device for controlling the decoder - Google Patents

Description

block 9 through the element 11 and the output of the block 10 is directly connected to the inputs of the element 12, the output 13 of which together with the output 14 of the element 15 forms the pair output of the device.

The input element NOT 15 is connected to the control input 8 of the blocking signal of the decoder. The input 16 of convolution unit 9 modulo two and the input 17 of convolution unit 10 modulo two are supplied with the parity bit of the input information (supplementary code of the input information for oddness).

11In the normal operation of the de-baffle, the signal appears only on one of its outputs. If it matches one of the even-numbered codes, the signal “1 is sent to the corresponding input and input 16 of block 9, as well as to the input 17 of block 10, and the remaining inputs of blocks 9 and 10 are“ O. ” As a result, the input element And 12, therefore, and at the output 13 of the element And 12 there is "1. At the output 14 of the element 15, an O is observed "O, since it appears at the input 8" 1.

If an odd code arrives at the input of the decoder, the signal "1" arrives at the corresponding input of block 10, at the remaining inputs of blocks 9 and 10 it is "O, at output 13 of the And 12 element" - "1. At output 14 of the element 15, HE 15 is again “O. When there is an " O at input 8, i.e., when all the decoder's outputs are blocked (this is done with a number of computer modes.) At output 14 of the HE element 15, it is " 1. At the same time, the signal "1 is present at one input of the And 12 element (depending on the value of the parity bit), and at the output 13 of the And 12 element -" O.

Thus, in normal operation and in the absence of faults, in the decoder and in the control device at outputs 13, 14 there are “1, O or“ O, 1.

Consider the operation of the device in the presence of faults and the input to the input of the decoder incorrect information.

The case of a malfunction in the decoder, leading to the absence of signals at all its outputs, at one of the inputs of the element 12, and, consequently, at its output 13 is observed "O. The signal “On is also present at the output 14 (at the input 8, the decoder blocking is“ 1). When signals appear simultaneously on two outputs of the decoder belonging to the same group, for example, odd, the output of the block, and therefore output 13, is O. Output 14 also observes "O.

Similarly, when a signal appears at the output of the decoder that does not correspond to the parity of the input (which happens with some faults of input elements 1), as well as when incorrect information is received at the input of the decoder, outputs 13, 14 show “O, O.” About outputs 13, 14 appear and with some faults of the device for monitoring,

for example, in the event of a malfunction (0) at the outputs of elements 10, AND, or 12.

Device malfunctions for controlling the type of the identical unit (1) at the outputs of elements 10, And 12 will be detected

at zero input 8, the decoder blocking. In this case, at the outputs 13, 14 there are "1, 1.

Thus, in the absence of faults in the decoder and device for

the control, as well as the receipt of correct information at the inputs at the outputs 13, 14, are the opposite signals "1, O or" O, 1. In case of malfunctions in the decoder or in the device for control, as well as

receipt of incorrect information at the input of the decoder at the outputs 13, 14 of the device, the like signals O, O or 1, 1 are observed. The proposed device for controlling the decoder performs full control of the decoder, controls the transmission of information to the input of the decoder and is simultaneously self-controlling, m E. All faults of the control circuit itself are detected.

in the process of normal functioning. A part of the malfunction of the control circuit is detected in the normal mode of the decoder, when only one of its outputs is energized, the mode "Locking the decoder, which is also the normal mode of the machine, is used to detect the remaining malfunctions. The self-control of the control circuit eliminates the possibility of masking errors in the operation of the decoder due to

Unreported control circuit faults.

Claims (1)

Invention Formula A device for controlling the decoder, containing two modulo convolution blocks, with inputs connected to two groups of outputs of the decoder, respectively, characterized in that, in order to extend the functionality, into the device two elements are NOT and the element And, and the output of the first convolution unit modulo two directly and the output of the second convolution unit modulo two through the first element are NOT connected to the inputs of the And element, the output which is the first output of the device, the input of the control bit of the decoder is connected to the corresponding inputs of the convolution blocks modulo two, the control input of the decoder is connected to the input of the element HE, the output of which is the second output of the device.