The pulse generator

 

The invention relates to a pulse technique and can be used in devices of computer engineering and control systems. The technical result is to increase functionality. The device has a majority element, the element ELI, two resistors, two condensers, two diodes. 1 Il.

The invention relates to a pulse technique and can be used in computer equipment and control systems.

Known pulse generator (see the book Yakovlev, C. N., Resurrection centuries, Miroshnichenko, S. I. and other Reference microelectronic pulse technique. K.: Machinery, 1983, Fig.9.3 g), containing two elements ILI, two resistors, two condensers, two diodes and a voltage source. The output of the first element ILI IS NOT connected directly to the first input of the second element ILI and the first output of the first capacitor and through the first resistor to the first output of the second capacitor, the anode of the first diode and the first of its entrance. The output of the second element ILI IS NOT connected directly to the second input of the first element ILI and the second output of the second capacitor and a second resistor with a second output to the first pole of the voltage source, the negative output of which is connected to a common bus. The outputs of the first and second elements ILI are NOT outputs of the pulse generator.

The disadvantages of the pulse generator are outliers voltage at the inputs of the elements ILI and overload output current switching due to overcharging of the capacitor.

Closest to the claimed invention, the essential features is the pulse generator (see and. C. the USSR №1279056 from 06.01.82, MKI: N 03 To 5/01, 5/153, “the protection Device bounce authors C. L. Worm, M. A. Guernica and A. C. Ryvkina, publ. 23.12.86, bull. No. 47), containing the majority element, an inverter and a delay element. The first input of the majority element is connected to the input bus. Second input of the majority element is connected with its output, the output bus and the input of the inverter. The inverter output through a delay element connected to the third input of the majority element.

The disadvantage of the pulse generator is the inability to generate a sequence of pulses due to the circuit construction.

The problem solved by the invention is the creation of a pulse generator with enhanced functionality, and have the attachment functionality is achieved in that in the pulse generator containing a majority element, the input and output bus connected to the output of the majority element and a second input, the entered item ILI, two resistors, two diodes and two condenser, first findings are combined and connected to the shared bus, the second terminal of the first capacitor is connected directly to the first input of the majority element and the anode of the first diode and the first resistor with the second output of the second capacitor, the third input of the majority element and a cathode of the second diode, the anode of which is connected to the cathode of the first diode and a second resistor with the output element ILI, the first input connected to the input bus and a second input from the output of the majority element.

This set of features allows you to extend the functionality of the generator pulse generator through the ability to generate a sequence of pulses by changing the duration of the control input.

The drawing shows a schematic diagram of the pulse generator.

The pulse generator contains a majority element 1, input 2 and output 3 tires, element ILI IS NOT 4, the first 5 and second 6 capacitors, the first 7 the output bus 3. The first terminals of the capacitors 5 and 6 are combined and connected to the shared bus. The second lead of the capacitor 5 is connected directly to the first input of the majority element 1 and the anode of diode 9 and through a resistor 7 to the second lead of the capacitor 6, the third input of the majority element 1 and the cathode of the diode 10. The anode of diode 10 is connected to the cathode of the diode 9 and the first output resistor 8. The second terminal of the resistor 8 is connected with the output element ILI IS NOT 4, the first input connected to the input bus 2, the second input - output majoritarian element 1.

The pulse generator operates as follows.

Consider the case when the supply voltage on the input bus 2 is a logic level "1". The output element ILI-4 level is set to a logical "0" which is supplied to the first and third inputs of the majority element 1. The output of the majority element 1 is set to logic level "0". The generator is in a stable state and does not produce output pulses. When applying to the input bus 2 trigger signal in the form of logical level "0" at the output of the element ILI-4 level is set to a logical "1". Starts the charge of the capacitor 6 with the output element ILI-NOT through a resistor is like the charge of the capacitor 5 more than the time constant of charge of the capacitor 6, the voltage on the latter will quickly reach the switching threshold and will continue to increase, tending in the limit to the level of logical "1". Upon reaching the voltage across the capacitor 5 level switching threshold majority element 1 at its output appears logical level "1". At the output of element ILI-4 level is set to a logical "0" and starts the discharge of the capacitor 6 through the resistors 7, 8 and the diode 6 and the capacitor 5 through the diode 6 and the resistor 7. Since the discharge time constant of capacitor 6 more than the time constant of charge of the capacitor 5, the voltage on the latter will quickly reach the switching threshold and will continue to decrease, tending in the limit to the level of logical "0". Upon reaching the voltage across the capacitor 6 level switching threshold majority element 1 at its output appears logical level "0". The process of generating output pulses will be repeated. The number of output pulses will be determined by the duration of the control pulse received on input bus 2, as appearing on the input bus 2 level logical "1" output of element ILI-4 level is set to a logical "0" and the generator stops high prototype functionality and it provides for the formation of not only single pulses, but also a series of pulses, depending on the duration of the control input pulse.

Made the layout generator. Tests showed the performance of the proposed device and its practical value.

Claims

The pulse generator containing a majority element, the input and output bus connected to the output of the majority element and a second input, wherein the element ELI, two resistors, two diodes and two condenser, first findings are combined and connected to the shared bus, the second terminal of the first capacitor is connected directly to the first input of the majority element and the anode of the first diode and the first resistor to the second output of the second capacitor, the third input of the majority element and a cathode of the second diode, the anode of which is connected to the cathode of the first diode and a second resistor with the output element ILI, the first input connected to the input bus and a second input from the output of the majority element.

 

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FIELD: measurement technology; pulse stream generators.

SUBSTANCE: proposed Poisson pulse stream generator has k + 1 memory devices, comparison unit, k digital-to-analog converters, control circuit, register, counter, selector, k bell-shaped pulse generators, adder, voltage-to-current converter, and clock generator.

EFFECT: enlarged generation range of pulses adequate to ionization chamber signals.

1 cl, 2 dwg

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