SU1175021A1 - Device for checking pulse sequence - Google Patents

Abstract

A DEVICE TO CONTROL THE PULSE SEQUENCE, containing ft input pins, the first and second OR elements, the switch, the prohibition elements, the first group of and AND elements, the delay line and the indicator, with 1,2, .... the nth switch outputs through the prohibition element connected in series and the AND element are connected respectively to the 1,2, .. ,,, P. of the m inputs of the second OR element and to the 1,2, ..., n m inputs of the indicator, the output of the first OR element is connected to the input the switch and through the delay line is connected to the second inputs 1,2, ..., elements of AND of the first group, 1,2, ..., the p-th inputs of the first element OR are connected respectively to the second inputs 1,2, ..., P. — TH of the prohibition elements, the output of the second element OR is the output of the device, characterized in that, in order to improve the noise immunity and expansion of functionality, it introduced n pulse formers, q delay elements and the second group of And elements, with QS inputs 1, 2,. . ., (of the th formers are associated respectively with the inputs of SP 1, 2, ...., (a-th of the delay elements and with 1,2, ..., n-m input buses, outputs 1,2, .. ., yy-th formers are connected respectively to the first inputs 1, 2, ..., P., P. AND of the second group, the second inputs of which are connected respectively to the inputs 1,2, ..., N. of the delay elements, and the outputs 1,2, ..., and -th elements AND of the second group are connected respectively with 1,2, ..., N-th inputs of the first element OR.

Description

The invention relates to a pulse technique and can be used in automation and computing devices. ) The purpose of the invention is to increase the noise immunity and enhance the functionality of the device. The drawing shows a block diagram of a device for controlling a sequence of pulses. The device contains rt input bus 1.1-1. And, (1 shapers 2.1-2. L pulses, and elements 3.13 .M - delays, first group of elements AND 4.1-4.h first: element OR switch 6, elements 7.1-7. K for pret, second group of elements And 8.1-8.U, the second element OR 9, the delay element 10 and the indicator 11 The inputs of the pulse formers 2.1-2. Neither the elements 3.1-З.И and the delays are connected per channel to the corresponding input buses 1.1-1.h, the outputs of the drivers 2.1-2.Vt pulses are connected respectively to the first inputs of elements AND of the second group 8.1-8. And, to the second inputs of which are connected respectively the outputs of the elements 3 .1-3 .W. Delays, and outputs of elements AND of the second group 8.1-8.P are connected respectively with 1,2, ..., h. Inputs of the first element OR 5 and with the second inputs of elements 7.1-7, p Prohibition, the output of the first element OR 5 is connected to the input of the switch 6 and through line 10 delay is connected with the second inputs of the elements AND of the first group 4.1-4, 1.2, ..., to the outputs of the switch 6 through sequentially connected elements 7.1-7. l ban and element AND of the first group 4.1-4.4 are connected per channel to respectively 1.2i-inputs of the second element OR 9 and 1.2, ..., n inputs of the indicator T1, the output of the second lementa OR 9 is a yield of the device. The device for controlling the sequence of pulses operates in a cyan mode. The monitored signal of the first channel from the first input bus 1.1 is sent to the input of the driver 2.1 pulses and simultaneously to the input of the first delay element 3.1. The signal removed from the outputs of elements 2.1 and 3.1 is combined at the AND 8.1 element and fed to the first input of the first one. element OR 5 and at the same time the second input of the first element: that 7.1 prohibition. From the output of the first element OR 5, the monitored signal is fed to the input of switch 6. If the monitored signal that came from the first output of switch 6 to the first input of the corresponding prohibition element 7.1 coincides with the signal that came from the output of element 8.1 to the second input of element 7.1 of Zagatta. the output of the inhibit element 7.1 is zero (potential indicating that the signal came from the first channel. With the arrival of the signal from the second channel, the switch 6 switches to the second state, i.e., its second output goes through signal 1, which is likewise compared to the signal received from the output of an E 8.2 element. This sequence of operation is preserved until the pulse arrives from the nth channel from the nth input bus. G arrival of this signal switches 6 to its initial state, after which the loop The ol resumes .If there is no signal, for example, from the second channel, and the signal arrives on the third channel, the switch 6 switches to the second state (1 on the second output). This signal goes to the input of the prohibition element 7.2. signal from the third channel at the output of element 7.2 of the prohibition on wits the signal is inconsistent in the form of a high level. Pulse signals of inconsistency from the outputs of elements 7.1–7.% of the ban after the response of element 10 delay arrive through the corresponding elements AND 4.1–4.a to the corresponding inputs 1.2 .., , f of the second element IL 9 and at the same time on the indicator 11 the number of the channel in which the failure occurred (the corresponding LED lights up) is fixed, and the indicator is blocked. At the output of the second element OR 9 (this output is the output of the device), a signal appears indicating a violation of the sequence of pulses. In the event of an extra pulse in one of the channels, the switch 6 switches to the next state, while the pulse on the next channel has not yet arrived, due to which at the output of the corresponding element 7.1-7. there is a mismatch signal, which comes through the corresponding element AND 4.1-4.and indicator 11, where the number of the channel in which the failure occurred is recorded. The signals from the outputs of the elements and 4.1-4.W. also arrive at the corresponding inputs of the second element OR 9, at the output of which a signal is sent, on the form. He has a narcotic effect on the sequence of pulses. To prevent spurious shading associated with bounce in the input signal chains, pulse shaping 2.1-2, and in response to 21 4; the input signal level is exceeded by a logic level 1 which generates a pulse that is obviously greater than the maximum duration of one pulsation period front, but obviously less than the duration of the useful controlled, th signal. This impulse, arriving at the inputs of elements AND 8.1-8.L, blocking the passage of input pulses through them, delayed along the leading edge by delay elements 3.1-3. at the time of transitional tt processes in the former. In this way, all input signals are blocked with a duration shorter. pulse shaping power. Element 10 delay ensures the reliability of the device in transient conditions.

Claims (1)

DEVICE FOR CONTROLLING A PULSE SEQUENCE, containing rt input buses, first and second OR elements, a switch, n inhibit elements, a first group of η 'AND elements, a delay line and an indicator, with the 1,2, ..., ηth outputs of the switch through the series-connected prohibition element and the AND element are connected respectively to 1,2, ... , 2, ..., and then the elements of the AND of the first group, 1,2, ..., d-th inputs of the first element OR are connected respectively with the second inputs 1.2 ... And, and the inputs 1,2, ..., (of the r-shapers are connected respectively with the inputs 1.2 .. .., ηth delay elements and with 1.2 ... which are connected respectively inputs 1,2, ..., and. of the delay elements, and the outputs 1,2, ..., of the th element AND of the second group are connected respectively with • 1,2, ..., П-mi inputs of the first element OR. ι Η 175021 2