SU573895A1 - Coding device for inverse code - Google Patents

Description

(54) CODIQUE DEVICE FOR INVERSE CODE

one

The invention relates to electric power and is intended for use in data communication equipment.

A coding device for an inverse code is known, which contains a storage distributor, a parity counter.

However, in this iyc environment, distortions are possible during coding. In addition, it is encoded, the information in the encoding process is lost and in the presence of distortions it cannot be recovered.

The encoding device for the inverse code closest to the proposed acquisition contains an accumulator and a distributor integrated in the input, the outputs of which are connected to the pulse shaper, as well as the parity counter AND the Element OR.

However, the known device is difficult because of the presence of a shaper of check code symbols, which contains at least two three-input elements I. With the increase in the number of bits of the transmitted code, the shaper of the shaper of check code symbols also increases proportionally.

The purpose of the invention is to simplify the device by excluding the driver of the verification code symbols.

To do this, an encoder for an inverse code containing the accumulator and distributor combined at the input, the outputs of which are connected to the pulse shaper, as well as the parity counter and the OR element, is entered a half-adder and two AND elements, respectively, the outputs distributor, to the other inputs of the elements And connected, respectively, the output of the pulse shaper and the half-adder, to one input of which the output of the pulse shaper is connected, and to the other - the output of the counter is even To the input of which is connected to one of the inputs of the OR element, the output of one AND element is connected, and the output of the other AND element is connected to the input of the OR element.

The drawing shows the structural electrical circuit of the proposed encoder for the inverse code.

The encoder for the inverse code contains the drive 1 and the valve 2 connected to the input, the outputs of which are connected to the pulse shaper 3, as well as the parity counter 4 and the element OR 5, entered by a half-adder b and two elements 7 and 8, with one of the inputs element And 7 are connected respectively to the outputs of the distributor 2, to the other inputs of the elements And are connected, respectively, the output of the imaging unit 3 pulses and half accumulator 6, to one input of which the output of the imaging device 3 pulses is connected, and to the other - the output of the counter 41 parity, to the input of which and to one of the inputs of the element OR 5 the output of one element AND 7 is connected, and the output of the other element J 8 is connected to another input of the element OR 5.

The encoder for the inverse code works as follows.

The information that grows from the rimvolves simultaneously enters into the accumulator 1 and triggers the distributor 2, imevdie ti vyrdov, on which the pulses are successively imparted. From the storage device 1, information is recorded in parallel in a shaper of 3 pulses consisting of two input elements I. Under the influence of 1 ... t distribution of pulses, information elements of the generator of 3 pulses are successively output to the communication channel through the element I 7, to the Other input of which the resolution is received from the distributor 2, and the element OR 5 and is entered into the parity counter 4 (a trigger with a counting input). Element And 8 filed prohibition.

After transferring m (informational pulse pulses, the parity counter 4 will determine the parity of the number of units in the encoded information, and with an even number of units per binary half-accumulator 6, the signal O is given. With C AB –f AB. Under the action of (W + 1).;;, 2t of pulse distribution information from the generator of 3 pulses through a binary, half-adder b, element 8, to the other input of which resolution is received from the distributor , 2, OR 5 enters the communication channel. If from the input of the parity counter 4 to the input of the binary half accumulator 6, the signal O is received, the check pulses repeat information, if from the output of the counter 4 parity the input of the binary half adder B receives the signal 1 The check pulses are the inversion of information. After 2 m of distribution of the two pulses, the encoder will return to the initial state.

The proposed encoder for the inverse code eliminates the need for checking symbols in the driver, the functions of which are performed by the pulse driver, the binary half-adder and element I. As the number of bits of the transmitted code increases, the volume of the device elements. designed to generate test pulses does not increase.

Claims (1)

Invention Formula an encoder for an inverse code containing a drive and a distributor integrated at the input, the outputs of which are connected to a pulse shaper, as well as a parity counter and an OR element, characterized in that, in order to simplify the device by excluding the checker of the code verification symbols, a half-summer and two And, at the same time, the outputs of the jpac-distributor are connected to one of the inputs of the And elements, to the other inputs of the Elementas I, and the output of the pulse former and a half-accumulator, respectively, are connected to Valid-stand is connected, the output pulse shaper and to the other - the output parity counter and to an input to which odnomu- inputs of OR element connected to the output of one AND gate and the output of another AND gate is connected to another input of the OR element.