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Phase sensitive detection type control system based on wideband triangular wave

A phase-sensitive detection and control system technology, applied in the field of electronics, can solve problems such as poor stability and performance, and achieve the effects of high power supply utilization, avoidance of nonlinear distortion, and wide frequency range

Inactive Publication Date: 2015-11-11
CHENGDU JIESHENG TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defect of poor stability of the current triangular wave control system and provide a phase-sensitive detection control system based on broadband triangular wave

Method used

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  • Phase sensitive detection type control system based on wideband triangular wave
  • Phase sensitive detection type control system based on wideband triangular wave

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Embodiment

[0022] Such as figure 1 As shown, the present invention consists of a front-end power supply circuit, a protection circuit connected to the output end of the front-end power supply circuit, a resonant circuit connected to the output end of the protection circuit, a comparison circuit and a trigger circuit connected to the resonant circuit, and a trigger circuit. A triangular wave control circuit, the triangular wave control circuit is composed of a triangular wave generating circuit and a triangular wave regulating circuit, and a phase-sensitive detection circuit connected in series between the comparison circuit and the resonant circuit. Among them, the triangular wave control circuit is composed of a triangular wave generating circuit and a triangular wave regulating circuit.

[0023] The triangular wave generating circuit is composed of a control chip U1, a transistor VT3, a resistor R16, a capacitor C6, a diode D2, a capacitor C7, a resistor R15, a potentiometer R14, and a...

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Abstract

The invention discloses a control system based on broadband triangular waves. The control system is characterized by being composed of a front-end power circuit, a protection circuit, a resonance circuit, a comparison circuit, a trigger circuit and a triangular wave control circuit; the protection circuit is connected with the output end of the front-end power circuit; the resonance circuit is connected with the output end of the protection circuit; both the comparison circuit and the trigger circuit are connected with the resonance circuit; the triangular wave control circuit is connected with the trigger circuit; the triangular wave control circuit is composed of a triangular wave generating circuit and a triangular wave regulating circuit. According to the control system, the utilization rate of a system power supply is higher, meanwhile, lower frequency can be output, and therefore the phenomenon of non-linear distortion of a display device is avoided; moreover, different frequency ranges can be switched, so that the frequency range of the control system is wider, and then the control system is suitable for different occasions.

Description

technical field [0001] The invention relates to the field of electronics, in particular to a phase-sensitive detection control system based on a broadband triangular wave. Background technique [0002] With the continuous development of science and technology, a large number of electronic products such as TVs and computers have appeared in people's lives. Triangular wave scanning circuits are used in TV screens, computer monitors and other display devices. However, at present, the general triangular wave system uses an analog circuit to charge the capacitor through a constant current source to generate a linear triangular wave voltage. Due to the interference of this circuit, it will generate different degrees of nonlinear distortion. In order to overcome this nonlinear distortion, a bootstrap circuit is usually added, but the bootstrap circuit shows good linearity only when the triangular wave frequency is small, so the stability of the existing triangular wave control sys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K4/06
CPCH02M5/458
Inventor 雷明方
Owner CHENGDU JIESHENG TECH CO LTD
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