SU387368A1 - RESERVED DEVICE - Google Patents

Description

one

This invention relates to automation and computing.

Redundant devices are known, comprising a main generator connected to an integrating circuit and a signal combining circuit, and a backup generator.

However, in known devices, in which the main and backup generators are not synchronous, the possibility of digital devices failing during transients caused by the failure of one of the generators has not been eliminated.

Many digital devices operate steadily during transients for clock synchronization, if this ensures the necessary duration of the period of the sequence of synchronizing pulses in any clock cycle. This duration of the synchronization pulse period must be at least the duration of the execution of any one-step operation in the digital device.

The aim of the invention is to increase the reliability of the device.

To do this, it introduces the subtraction circuit of the first pulse of the sequence, the prohibiting input of which is connected to the output of the integrating circuit, the signal input to the output of the backup generator, and the output to the corresponding input of the signal combining circuit. This allows one to ensure the necessary nature of the transient process in the device when one of the generators fails and to eliminate the possibility of digital devices failing via clock synchronization circuits.

The drawing shows a block diagram of a redundant device.

The redundant device consists of a main generator /, a backup generator 2, an integrating circuit 3, a subtractor 4 of the first pulse, a signal combining circuit 5 and a load 6.

The output of the main generator / through the integrating circuit 3 is connected to the prohibiting

the input of the subtracting circuit 4 of the first pulse, the other input of which is connected to the output of the backup generator 2. The outputs of the main generator / and the circuit 4 of subtracting the first pulse through the circuit 5 are connected to the load 6.

The device works as follows. In the normal state, both oscillators /, 2 and the signal from the output of the main oscillator / are fed to the integrating circuit.

5 and through the circuit 5 to the load 6. The control-potential from the integrating circuit 3 is fed to the inhibitory input of the first pulse subtraction circuit 4, prohibiting the passage of the signal of the backup generator 2 through it.

If generator 2 fails, the signal of the main generator / on the load does not change.

If the generator fails, the inhibit signal generated by the integrated circuit 3 is removed, and the signal of the backup generator 2, with the exception of the first pulse, passes through the subtraction circuit 4 and circuit 5 to the load 6.

Subject invention

The reserve device contains a main generator connected to an integrating circuit and a signal combining circuit, and a standby generator different. In order to increase the reliability of the device, it contains a circuit for subtracting the first emulsion of the sequence, prohibiting the input of which is connected to the output of the I1 integrating circuit, the signal input to the output of the backup generator, and the output to the corresponding input of the signal combining circuit.