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Control system based on broadband triangular waves

A control system and triangular wave technology, applied in the electronic field, can solve the problems of low voltage amplitude, low power utilization rate, and difficult to achieve very low frequency, and achieve the effect of wide frequency range, high power utilization rate, and avoiding nonlinear distortion

Inactive Publication Date: 2015-03-25
CHENGDU ZHILIDA TECH
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  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the current triangular wave control system that the voltage amplitude is not high, the power utilization rate is low, and the frequency is difficult to reach very low, and to provide a control system based on a wide-band triangular wave with adjustable frequency

Method used

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  • Control system based on broadband triangular waves

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Embodiment

[0018] Such as figure 1 As shown, the control system based on the broadband triangular wave of 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 connected to the resonant circuit and a trigger circuit, and a triangular wave control circuit connected to the trigger circuit. Wherein, the triangular wave control circuit is the focus of the present invention, which is composed of a triangular wave generating circuit and a triangular wave regulating circuit.

[0019] 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 potentiometer R17. When connected, the base of the triode VT3 is connected to the ground after passing through the resistor R16 ...

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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 scanning 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 can only show good linearity when the triangular wave frequency is small. Therefore, the existing triangular wave voltage amplitude is not high, and the po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M5/458
CPCH02M5/458
Inventor 杜琴
Owner CHENGDU ZHILIDA TECH
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