SU738173A1 - Circular switching device - Google Patents

Description

(54) RING SWITCH

one

The invention relates to a pulse technique, in particular, to devices for collecting telemetry information, and can be used to generate a sequence of phase-shifted pulses, and also to divide the frequency of the pulses by any predetermined integer value.

The circuits of the Sras-commutators (pulse distributors) are known), performed on successively included in the chain elements with two stable equilibrium states and a closed ring 1.15

Along with simplicity and flexibility (the number of cad cads in a ring is fundamentally unlimited), these switches have the disadvantage that when the circuit is operated, even a short-term disturbance, such as 20 from the power supply circuits, usually leads to disruption of the normal operation of the switch, which can only be restored by forcibly stopping and starting the circuit, for example, with a key.

A pulse distributor is known that has a special protection circuit against malfunctioning, consisting of 30

from series-connected switching stages, clock generator, multi-input element AND, and additional switching stage with connections 2.. This device is effective in building pulse distributors for an odd number of channels and is used in building pulse distributors for the number of channels from 3 to 10. In addition, this device implements protection only from previously provided forbidden states.

The aim of the invention is to improve operational reliability by restoring the required number of signals circulating in the device.

The goal is achieved by the fact that in a ring switch containing a clock pulse connected to START: in all the inputs are sequenced: t1 cascades with two stable conditions, and a two-input element And, additionally an asymmetric generator of relaxation oscillations with external synchronization inputs in both half-periods the output connected to the input of the first

738173 switch cascade and to the B from the inputs of the two-input element I, and through an additional amplifier-shaper and block for the delay - to the clock input over a larger half-period of oscillation half period of the generator of relaxation oscillations. The drawing shows a block diagram of the proposed switch. The switchboard contains switching stages 1,2, ..., p-1, p / asymmetric generator 3 relaxation oscillations amplifier-shaper 4, cascade holding 5, two-input element And 6, generator 7 clock pulses. In the considered version of the switch .n-lQ. The ring switch operates as follows, When supplying voltage and clock pulses from generator 7, all stages 1,2, ..., n-1 / ft are reset (one arm is locked, the other arm is open and generator 3 arbitrarily generates a switch start impulse, by placing the switch on cascade 1 and setting it in a position opposite to the initial one. ”At the same time as the cascade is fed to the cascade, the start impulse from the asymmetrical relaxation generator K9 lebanir enters: the prohibition on passing jp-gg pulses from the cascade nV, the output of which is connected to the second input of the element Ib; - to amplifier 4, which generates a synchronization pulse from the larger half of the unbalanced oscillator 3. This pulse is applied to the cascade 5 and is delayed by it for a time - T1, J5OlyIJee- .o smaller than T olia Impulse from cascade 5 arrives at xx: Allowing the larger half-period of asymmetric generator 3 and re-generating it into the opposite, as a result of the passage of impulses through the element Ib. After all the cascades of the ring switch are triggered, the pulse from the nth cascade goes through element Ib to the station Fr & nkku the input of the smaller half-period of the asymmetrical generator 3 and returns it to its original state, at which the next trigger pulse is formed. The next process is repeated. In this ring commutator, for interference shielding, the simultaneous operation of several helmets and leading to its incorrect operation, is performed as follows. Let simultaneously with the launch of an asymmetric generator 3 of the relaxation oscillations of the cascade I of the ring commutator, under the influence of interference, the third, fifth, seventh and ninth cascades are started. This will result in several triggers of some stages of the ring switch in time. (during normal operation of the ring switch, only one operation of each cascade entering into it should occur during the lolio time). Due to the false alarms of the cascades of the ring switch at the output of the tenth cascade connected through the element Ib with the generator 3, four false pulses are shifted in time with a time shift. . Consider the impact of these pulses on the operation of the ring switch as a whole. The impulses from the false triggering of the ninth and seventh cascades will not pass through the element 6 because the pulse of the inhibitor (start) of the generator 3 acts on it and, therefore, the oscillations will not lead to premature activation of this generator. The impulse from the false triggering of the cascade will go to the element Ib after the removal of the inhibitor from the generator and, therefore, will trigger the generator 3 and the new start of the ring switch. After cleaning generator 3. BHOjBb imposes a ban on the passage of signals through the element Ib, and: the impulses from the false triggering of the third stage and the normal during the period of the impact of the triggering operation of stage 1 will not have any effect on generator3. Thus, the required correct number of signals circulating in the device will be restored. Simultaneously with the launch of the switch, the false actuation of the sixth, seventh / eighth / ninth and tenth stages does not affect the operation of generator 3 and does not disrupt the subsequent normal operation of the ring switch. The false triggering of any of the cascades — the second, third, fourth, or fifth — by the very first time pulse causes a premature new start of the ring switch / however, after this, the subsequent normal operation of the switch will be restored. The present invention makes it possible to fully utilize in practice such a switch quality / as increased reliability in operation during

the expense of restoring the required number of signals circulating in the device, when exposed to the scheme of random and strong impulse noise.

Claims (2)

1. Telemetry reference. Under 5 ed. A.L. Grunberg. M., Mashinostroit nye, 1971, p. . 2. Vukreev IM, et al. Microelectron circuits of digital devices. M., Sov. radio, 1973, p. 225 (prototype) 20