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Narrow pulse generating circuit

A technology for generating circuits and narrow pulses, applied in pulse generation, pulse technology, electric pulse generation, etc., can solve the problems of complex circuit structure, unstable narrow pulse signal, and no protection circuit for load circuits, etc., to achieve simple circuit structure, Narrow pulse signal keeps stable effect

Inactive Publication Date: 2011-01-12
宁波汉迪传感技术有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The circuit structure is complex, the narrow pulse signal is unstable, and there is no protection circuit for the load circuit

Method used

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Embodiment Construction

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0027] Such as figure 1The narrow pulse generating circuit shown includes a digital signal source 1, a 1:1 transformer 6, a high-pass filter circuit 2, an IGSFET driver 3, an IGSFET 4, a pulse feedback control circuit 5 and a load circuit, wherein , the digital signal source 1 is used to generate the excitation trigger signal to the narrow pulse generating circuit, the input end of the 1:1 transformer 6 is connected with the output end of the digital signal source 1, and the output end of the 1:1 transformer 6 is connected with the high-pass filter The input terminals of the circuit 2 are connected; the high-pass filter circuit 2 is composed of the fourth resistor R4, the fifth resistor R5 and the second capacitor C2, wherein the two ends of the fourth resistor R4 are connected to the two output terminals of the 1:1 transformer 6; the second ...

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Abstract

The invention relates to a narrow pulse generating circuit, which is used for generating narrow pulses for being used by a load circuit and comprises a digital signal source (1) and a high-pass filter circuit (2); the invention is characterized by further comprising an insulating gate field effect transistor driver (3) and an insulating gate field effect transistor (4), a gate electrode of which is connected with the output end of the insulating gate field effect transistor driver (3), a load circuit power supply voltage is connected with a drain electrode of the insulating gate field effect transistor (4) subsequent to being connected with a first resistance (R1); a first end of a first capacitance (C1) is connected with the drain electrode of the insulating gate field effect transistor (4) while a second end of the first capacitance (C1) is connected with the first end of a second resistance (R2), the load circuit is connected between the second end of the second resistance (R2) anda source electrode of the insulating gate field effect transistor (4); and an input end of a pulse feedback control circuit (5) is connected with the output end of the insulating gate field effect transistor driver (3) while an output end of the pulse feedback control circuit is connected to the input end of the insulating gate field effect transistor driver (3). Compared with the prior art, the narrow pulse signal generated by the invention remains steady.

Description

technical field [0001] The invention relates to a narrow pulse generating circuit. Background technique [0002] Some load circuits that need to be triggered by narrow pulses generally require a narrow pulse generating circuit that can output relatively stable and protect the load circuit. For example, in a distributed optical fiber sensing system, a narrow pulse laser is one of its core components. This kind of laser requires a nanosecond pulse width, and needs to realize the adjustable pulse intensity and pulse repetition frequency. It also requires the laser source to be a single Longitudinal mode, narrow bandwidth, high stability, less susceptible to external interference. The traditional pulsed light generation system uses a semiconductor laser and an acousto-optic modulator to make the fiber laser modulated into pulsed light by an acousto-optic crystal. The disadvantage of this solution is that the laser output from the semiconductor laser has a wide bandwidth, and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K3/356
Inventor 金如江
Owner 宁波汉迪传感技术有限公司
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