SU1248040A1 - Single pulse generator - Google Patents

Abstract

The invention relates to a pulse technique. It can be used to automatically block the output signals of the automation devices when the supply voltage rises and to set the 4th memory elements to the initial state. The purpose of the invention is the expansion of the function; Opportunity is achieved by providing control of supply voltages. In addition, an element I and n additional voltage control units corresponding to n power sources are additionally introduced into the driver. The shaper contains, 1K-trigger 1, element I 2, block 3 and n additional blocks 3-1, ..., 3- (n + 1) voltage control, output tires 5 and 6. Each of blocks 3.3 - ., 1, ..., 3-p control of the voltage of the controlled power source contains a threshold element 7, the element 8 of galvanic isolation. The threshold element 7 contains a reference element 9, a zener diode 10 and resistors 11, 12 and 13. 2 Il. 31 (L Fi. 1

Description

The invention relates to a pulse technique and can be used to automatically block the output signals of automation devices when the supply voltage rises and to set the memory elements to their initial state.

The purpose of the invention is to enhance the functionality by ensuring control of the supply voltages.

FIG. 1 shows the electrical circuit of the proposed shaper; on fip. 2 - timing diagrams that show his work.

A single pulse shaper contains a 1K-trigger 1, element I 2, block 3, and n additional voltage monitoring blocks of a monitored power source, with the first and second inputs of all blocks. Control 3, 3m 1, ..., 3 - (n 1) the voltage of the monitored power source is connected to. the corresponding buses of the controlled power sources, and the outputs by the corresponding inputs of the element And the output of which is connected to the R-input of the 1K-flip-flop, 1, inverse, the output of which is connected to its I- and K-inputs and to the first output bus 4, direct, output - with the second output bus 5, C-input - with the bus 6 clock pulses.

Each of the blocks 3, 3-1, ..., 3-p control of the voltage of the monitored power source contains a threshold element 7, an element of galvanic isolation, the output of which is connected to the output of the voltage control unit of the monitored power source, the input - with the output a threshold element 7, the first and second inputs of which are connected to the corresponding inputs of the voltage control unit of the monitored power source.

The threshold element 7 may consist of a comparison element 9, a Zener diode 10, three resistors 11, 12 and 13, the first outputs of the first and second of which are connected to the corresponding inputs of the threshold element, and the second input of the first resistor 11 is connected to the second output of the second resistor 12 and with the first input of the comparison element 9, the second input of which is connected to the cathode of the Zener diode 10 and through the third resistor 13 to the first output of the second resistor 12, and the anode of the Zener diode 10 is connected to the first output of the first resistor 11,

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5 fo 5 0

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five

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Moreover, the output of the comparison element 9 is connected to the output of the threshold element 7.

Shaper single pulse works as follows.

When the first power source is turned on, its output voltage Uy increases exponentially (Fig. 2fi). At time t, the voltage of the power source reaches the threshold value U. at which the voltage value at the first input of element 9 becomes equal to (approximately) the voltage at its second input, as a result of which it triggers and element 8 is triggered the output of which a level (fig. 2 &) of a logical unit appears.

The remaining voltage monitoring units of the monitored power source operate similarly to that described, as a result of which at time t (Fig. 2e) element 2 (Fig. 3A) is triggered, at the output of which a level of logical one appears.

The first impulse arriving from shield 6, after the moment t at the instant tj (Fig. 2 ek :), triggers trigger 1 into one state, at which the setting pulse disappears at the output of the former.

Thus, the proposed shaper allows a single pulse to be obtained automatically as the supply voltages of all monitored power supplies rise. The appearance of this single pulse does not depend on the rate of increase of galvanically unloaded supply voltages.

Claims (1)

Invention Formula A single pulse shaper containing a 1K trigger, the inverse output of which is connected to the I and K inputs and the first output bus, the direct output to the second output bus, the C input to the clock pulse bus, and the voltage control unit monitored power supply, the first i and the second inputs of which are connected to the corresponding power supply buses, characterized in that, in order to extend the functionality by providing control of the supply voltage, the element I, n up to 31 is introduced into it additional voltage control units of the corresponding n sources, lithans; the first and second inputs of all voltage control units of the monitored power source are connected to the corresponding buses and monitored power sources, and the outputs to the corresponding inputs of the I element, the output of which is connected to the R input 1K trigger, with the control unit voltage control480404 power source contains a threshold and an element of galvanic isolation, the output of which is connected to the output of the control unit. 5 voltage of the monitored power source, input - with the output of the threshold element, the first and second inputs of which are connected to the corresponding inputs of the control unit — app-10 —for the monitored power source. FIG. 2