SU879815A1 - Time switching device - Google Patents

Description

(54) DEVICE OF TEMPORARY COMMUTATION

I

The invention relates to electrical communication technology and can be used in digital information distribution systems.

A time switching device is known comprising a series-connected demultiplexer, a memory unit and a multiplexer, as well as series-connected master oscillator and clock generator, the outputs of which are connected to the control inputs of the demultiplexer G 1

However, the known device is difficult.

The purpose of the invention is to simplify the device by reducing the number of memory blocks.

For this purpose, a time switching device containing serially connected demultiplexer, memory block and multiplexer, as well as serially connected master oscillator and clock generator

pulses, the outputs of which are connected to the control inputs of the demultiplexer, are entered into one shift shift registers, where n is the number of switched channels, whose inputs are connected to the second output of the master oscillator, and the outputs of the shift registers are connected to the corresponding second multiplexer inputs.

The structure of the proposed device is represented on the circuit 10.

The time switching device contains a demultiplexer 1, a memory block 2, a multiplexer 3 defining

15 generator 4, driver 5 clock pulses, log / j n shift registers 6.

The device works as follows.

20

The demultiplexer 1 divides the information of the input digital stream into n digital streams. Information of each of them during

Claims (1)

The claims by the pulse sequence coming from the master oscillator 4, the information stored in the shift registers is shifted. Thus, the outputs of the shift registers in each cycle change their state, respectively, information recorded in the shift registers. During the connection time, i.e. in the intervals between connecting the central control unit, at the outputs of the shift registers' 6 with a period equal to one cycle, the same sequences of control pulses appear, which read out information from memory unit 2 at certain temporary positions of the outgoing digital path. Thus, the positive effect of the implementation of the proposed invention is that the reliability of the device is increased due to a decrease in the number of functional elements of the circuit and a decrease * in the total number of connections between functions 15 Temporary switching device. comprising a demultiplexer, a memory unit and a multiplexer connected in series, as well as a 2Q driver and a clock driver connected in series, the outputs of which are connected to the control inputs of the demultiplexer, characterized in that, in order to simplify the device by reducing the number of blocks Pa, log ^ n shift registers are entered. And is the number of switched memory, and cash, the inputs of which are connected to the second output of the master oscillator, and the outputs of the shift registers are connected to the corresponding second and multiplexer inputs.