SU995399A1 - Redundancy pulse generator - Google Patents

Description

(54) RESERVED PULSE GENERATOR

one

The invention relates to a pulse technique and can be used in automation and computing devices.

A redundant pulse generator is known, comprising two pulse generators, a control trigger, a switch, the inputs of which are connected to the outputs of the pulse generators and a control trigger, an integrator, and a match unit 1.

The disadvantage of this device is the low reliability caused by component heterogeneity.

Closest to the proposed technical solution is a redundant pulse generator containing two pulse generators, two triggers and a switch, the first and second inputs of which are connected to the direct outputs of the pulse generators 2 ..

However, the known device is characterized by low reliability and complexity of the design.

The purpose of the invention is to increase reliability and simplify the design.

The goal is achieved by the fact that in a redundant pulse generator containing two pulse generators, two

trigger and switch, the first and second inputs of which are connected to the direct outputs of the pulse generators, introduced three elements AND-NOT and two elements OR-and the inputs of the first element OR-NOT

5 are connected to the direct outputs of the first and second pulse generators and respectively to the tl and K inputs of the first trigger; the inputs of the second element OR are NOT connected to the inverse outputs of the first

.Q and the second pulse generator, respectively, with the L and K inputs of the second trigger, the inverse outputs of the flip-flops are connected to the inputs of the first AND-NOT element whose output is connected to the third input of the switch, the outputs of the first and second elements OR are NOT connected respectively to counting inputs of the first and second triggers, to the installation inputs of which are connected, respectively, the outputs of the second and third elements AND-HE, the first input of the second element AND-NOT connected to

20 direct output of the second pulse generator, and the second with the inverse output of the second trigger, the first input of the third element AND-NOT is connected to the inverse output of the second pulse generator, and

the second - with the inverse output of the first trigger.

The drawing shows a structural electrical circuit of a redundant pulse generator.

The proposed device contains two pulse generators 1 - 1 and 1-2, two triggers 2-1 and 2-2, switch 3, three elements AND-NOT 4-1 - 4-3, as well as two elements IL AND-NE 5- 1 and 5-2.

The device works as follows.

While both pulse generators 1-1 and 1-2 are working, the pulse signal at the output of the device comes from that pulse generator whose signal has a phase ahead of the signal of the other. This is due to the fact that each of the pulse generators 1-1 and 1-2 tends to set the triggers 2-1 and 2-2 to the opposite state. The signals from the output of the generator 1 - 1 pulses, arriving at the W-inputs of the flip-flops 2-1 and 2-2, tend to set them to the state "1, and vice versa, the signals from the generator output 1-2 pulses, arriving at the K-inputs and the installation inputs of the flip-flops 2-1 and 2-2, tend to set the flip-flops 2-1 and 2-2 to the state "O.

IF the signal from the generator output of 1-2 pulses is phase leading, then both triggers are set to the state "O," 1 appears at their inverse outputs, and at the output of the AND-NE element 4-1 - "O, and The device output signal from the generator 1-2 pulses. In all other combinations of states of the flip-flops 2 (01, 10, 11), the output of the NAND 4-1 element is present "1" and the signal of the generator of 1 - 1 pulses is switched to the output of the device.

Thus, the selection of a generator, the signal of which is switched to the output of the device, is automatic, if necessary, and does not require installation circuits to their original condition.

In case of failure of the generator 1 - 1 pulses, when constantly on its direct output is "O", both triggers 2-1 and 2-2 are transferred by signals from the pulse generator to the "O" state, moreover, if both triggers 2-1 and 2-2 were in the state "1, then the trigger 2-1 changes its state first, since the signal from the generator output of 1-2 pulses passes through the OR-HE 5-1 element to the gate input of the trigger 2-1, and then the state of the trigger 2-2 changes, as the signal from the generator output of 1-2 pulses passes on its installation stroke.

In case of failure of the generator 1 - 1 pulses, when "1" is constantly present at its output, both triggers 2-1 and 2-2 also go to the state "O, but in the other

sequence than in the previous case.

In both cases, after the failure of the pulse generator, the signal at the output of the devices is switched from the generator of 1-2 pulses.

If the generator fails 1-2 pulses, the triggers 2-1 and 2-2 move gradually.

either in state 01 or in 10, depending on what logical potential is present at the output of the failed generator.

In this case, the output of the element AND-NOT 4-1 appears "1 and, therefore, the output

The device switches the signal from the generator 1 - 1 pulses.

The presence in the known device of the set-up circuit does not allow the device to function independently without the set-up device.

The proposed device, by contrast, is completely autonomous.

In addition, it is simpler known, since it does not contain a control trigger, and the initial setup device (integrator).

Claims (2)

1. USSR author's certificate number 526056, cl. H 03 K 1/00, 1976. 2. USSR author's certificate number 702552, cl. H 05 K 10/00, 1978.  / g - / g / - /