Narrow pulse generator circuit based on tunnel diode

Abstract

The invention discloses a narrow pulse generating circuit based on a tunnel diode. Including the main circuit and the driving circuit, the main circuit is mainly composed of the upper circuit including the microwave transistor Q2, the lower circuit including the microwave transistor Q1 and the microwave transistor Q3, and the amplification circuit including the microwave transistor Q1; the upper circuit and the lower circuit are connected in parallel, The input terminals of the upper and lower circuits are connected to the drive circuit, and the output terminals of the upper and lower circuits are output narrow pulse signals through the amplifying circuit. The upper, lower and amplifying circuits are all connected to the DC power supply VCC. The invention has simple structure, high emission frequency, can realize narrow pulse signal of nanosecond level or even picosecond level, has large output voltage and high reliability, and can be widely used because of its low cost.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a tunnel diode-based narrow pulse generating circuit capable of generating ns (nanosecond) level or even ps (picosecond) level narrow pulse signals. Background technique [0002] Electrical narrow pulses are fully used in computer, radar, communication, automatic control and other fields, such as cable testing based on time domain reflection technology. The time domain reflection device sends narrow pulses to the cable under test. When the pulse passes through the deformation point of the cable, an echo will be generated. The deformation position of the cable can be accurately measured by comparing the received echoes. The narrower the pulse sent by the instrument, the larger the amplitude, and the farther the distance it propagates in the cable, the stronger the ability to measure the specific position of the cable deformation. In terms of automatic control, for example, a mic...

AI Technical Summary

Problems solved by technology

However, there are disadvantages such as long trigger time interval and unstable signal output, so it is difficult to use in actual production

[0004] Sequential logic circuits directly generate narrow pulses. Since the output voltage amplitude of sequential logic chips is low, and the rising edge of the narrow pulses generated is generally more than ten nanoseconds, it often fails to meet the equipment requirements. This method is very difficult in high-precision instruments. Difficult to get applied

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