SU930619A1 - Pulse length discriminator - Google Patents

Description

one

The invention relates to a pulse technique and can be used in automation and telemechanic devices for the selection of pulses in duration.

A pulse selector is known in terms of duration, comprising two single vibrators, a differentiating circuit, four inverters, two triggers and five coincidence elements. This device allows the allocation of im-. pulses, the duration of which is less than or greater than the set values, and within these set values, while simultaneously restoring the duration of the input pulse on the output buses of the device pj.

However, this pulse selector is complex in duration (contains an enormous number of elements).

The closest in technical essence to the invention is a pulse selector in duration, containing two single vibrators, a differentiating circuit and two coincidence elements, the first inputs of which are connected to the output of the differentiating circuit, and the second inputs are connected respectively to the outputs of the first and second one-shot, the inputs of which are connected to the input of the differential circuit and the input bus of the device 2.

For all its simplicity, this device has limited functionality, it can select only input pulses that have a duration less than one set value or more than another

G5 set value

The purpose of the invention is to expand the functionality of the device, namely: the selection of pulses with

20 with a duration of less than or more than the established values, and with a duration within the limits of the values of the established values with the corresponding distribution of the signal on the output buses of the device. This goal is achieved in that a device containing two single-oscillators with direct and inverse outputs and a differentiating circuit connected by their inputs to the input bus of the device and the first and second elements of coincidence, the outputs of which are the output buses of the device, the first inputs of which are connected to an output, a differentiating circuit, and the second inputs of the first and second coincidence elements are respectively connected with the direct outputs of the first and. the second one-shot, the third coincidence element is introduced, the output of which is the third output bus; The second input is connected to the inverse output of the first single vibrator and the third input of the second element, the third input is connected to the inverse output of the second single vibrator, the direct output of which is connected to the third input of the first element of the match. scheme of the proposed device. The device contains one-shot 1 and 2, differentiating circuit @ 3, elements of coincidence - 6, input bus 7 and output buses 8 - 10. The inputs of one-vibration 1 and 2 and differentiating circuit 3 are connected to the input bus. drops, 6, the second inputs of the coincidence elements (and 5 are connected respectively to the direct outputs of the one-oscillators 1 and 2, the second input of the element of the coincidence 6 is connected to the inverse output of the one-vibrator 1 and the third input of the coincidence element 5, the third inputs of the coincidence elements and 6 are connected respectively to the direct and inverse outputs of the one-shot 2. The outputs of the matching elements 4-6 are the output buses 8-10 of the device. The pulse selector operates as follows. The signal duration T removed from the output of the one-vibrator 1 determines the minimum tolerance of the duration the input pulses, and the signal of duration T, taken from the output of the one-shot 2, determines the maximum allowable deviation of the duration of the input pulses. .9 .4; in the initial state (with | no input pulses) signals on the output buses are absent. When pulses arrive at the input bus 7, the one-shot 1 and 2 generate signals of duration T and Tg respectively, and at the output of the differentiating circuit 3 a signal is generated on the falling edge of the input pulses. If the duration of the input pulses is less than the value of J, then at the inputs of the coincidence element k, the signals taken from the direct outputs of the one-vibrators 1 and 2 and the output of the differentiating circuit 3 coincide. At the output of the coincidence element C, there is a signal that carries the information that the duration of the input pulses is less than the allowable value. If the duration of the input pulses is greater than the value of Tg, then the signals taken from the inverse outputs of one-shot 1 and 2 and from the output of the differentiating circuit 3 at the inputs of the match element 6 coincide. input pulses more than acceptable. If the duration of the input pulses is greater than the allowable value of T, but less than the allowable value of T2, then. the signals taken from the inverse output of the one-vibrator 1, the direct output of the one-vibrator 2 and the output of the differentiating circuit 3 coincide; but less than the maximum value. The positive effect of the proposed pulse selector is in terms of extending the functionality of the device, consisting in the selection of input pulses with duration less or more than the set values, and with the duration of the input pulses more than the set minimum value, but less than the set maximum value. In addition, the ambiguity in the formation of output signals is eliminated in the case when the duration of the input pulses is shorter than the allowable value.

minimum value, i.e. extends the range of selection of input pulses in duration.

Claims (2)

1. USSR Author's Certificate No. yjeSjS, cl. H 03 K 5/15, 1980. 2. USSR author's certificate No. 595856, cl. H 03 K 5/15, 1978 (prototype).