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Relaxation oscillator

A relaxation oscillator and amplifier technology, used in power oscillators, electrical pulse generator circuits, and applications of nonlinear magnetic devices/non-linear dielectric devices to generate pulses, etc., can solve the problem of occupying circuit board area, increasing circuit noise, issues such as increased costs

Inactive Publication Date: 2015-04-29
PRINCETON TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the relaxation oscillator disclosed in this reference requires as many as six transistor switches to select the desired input reference voltage, which takes up a lot of board area and increases cost, and adds noise to the circuit

Method used

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Embodiment Construction

[0026] The following describes the preferred embodiment of the present invention. Each embodiment is used to illustrate the principles of the present invention, but not to limit the present invention. The scope of the invention should be judged by the appended claims.

[0027] figure 1 It is the main circuit structure diagram of the relaxation oscillator of the present invention. The relaxation oscillator of the present invention is suitable for use in touch panels, but is not limited to such applications. Please refer to figure 1 , the relaxation oscillator of the present invention includes a first amplifier AMP1, a second amplifier AMP2, a switch combination S1 and a sensing capacitor C F . The first amplifier AMP1 has an inverting input terminal, a non-inverting input terminal and an output terminal, wherein the output terminal of the first amplifier AMP1 is connected to an inverting input terminal of the second amplifier AMP2, and the inverting input terminal of the f...

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Abstract

The invention relates to a relaxation oscillator which comprises a first amplifier and a second amplifier, wherein the first amplifier is provided with a first input end for receiving an output voltage signal, a second input end for receiving a reference voltage signal and an output end for comparing the output voltage signal with the reference voltage signal and responding comparison results to output a control signal; the second amplifier is provided with a first input end for receiving the output voltage signal, a second input end connected to the output end of the first amplifier to receive the control signal and an output end connected to the first input end of the first amplifier and the first input end of the second amplifier and used for comparing the control signal with the output voltage signal and responding comparison results to output the output voltage signal. The output voltage signal is a periodic oscillation signal with a non-sinusoidal waveform. According to the relaxation oscillator, the problem of clock pulse feed-in can be completely solved, the use area of a circuit board and the cost can be reduced, and noise in a circuit can be reduced.

Description

technical field [0001] The present invention relates to a relaxation oscillator, in particular to a relaxation oscillator used in a touch panel. Background technique [0002] An oscillator is generally an electronic circuit used to generate a periodic analog signal. Generally speaking, oscillators are mainly divided into two types, one is a harmonic oscillator (harmonic oscillator), which is a circuit that generates a sine wave output voltage by relying on the self-excited oscillation of the circuit; the other is a relaxation oscillator (relaxation oscillator). oscillator). Relaxation oscillators are used to generate non-sinusoidal output voltages, such as square, sawtooth, or triangular wave output voltages, which contain nonlinear components such as transistors to periodically recycle the energy stored in capacitors or inductors. The ground is released, causing the output signal waveform to change instantaneously. On the other hand, due to the rise of smart phones and t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03B5/02H03K3/45
Inventor 曹铭原
Owner PRINCETON TECHNOLOGY
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