Related method and tech. for voltage controlling oscillator

Abstract

This invention provides a voltage-controlled oscillator and related technology including a conversion circuit, a duplicate bias circuit and a circle oscillator, in which, the conversion circuit is in the subtraction structure of the currents formed by two MOS transistors with source resistors to turn a control voltage to a control current in linearity, the duplicate bias circuit is to provide an amplitude voltage according to the voltage set up on a load based on a definite value of current, a negative-resistance unit is set in the circle oscillator to help driving signals to oscillate to control frequencies of signals in terms of the control current and the amplitude voltage.

Description

technical field [0001] The present invention relates to a voltage-controlled oscillator and related methods / techniques, in particular to a voltage-controlled oscillator and related methods / techniques capable of achieving better voltage-controlled frequency characteristics in consideration of component characteristic drift mutual compensation. Background technique [0002] In the modern information society, all kinds of knowledge, information, documents, data and audio-visual files can be quickly transmitted, processed, managed and stored in the form of electronic signals, so various electronic circuits related to electronic signals have become One of the most important hardware foundations of the modern information society. [0003] As known to those skilled in the art, in various wired / wireless communication circuits, signal processing circuits and even various clock-controlled sequential circuits / processors, a phase-locked loop is a necessary construction One of the squar...

AI Technical Summary

Problems solved by technology

This means that the voltage-controlled oscillator after component characteristics drift will not be able to oscillate out of the originally designed frequency, resulting in abnormal operation and easy introduction of jitter

For example, if the original voltage-controlled frequency range of a known voltage-controlled oscillator should be 400MHz to 550MHz (MHz is one million hertz), but the voltage-controlled oscillator with component characteristics drifts, the voltage-controlled frequency range changes Drift to 470MHz to 670MHz, which means that the voltage-controlled oscillator with component characteristic drift will not be able to oscillate at a frequency of 400MHz to 470MHz, which will cause the voltage-controlled oscillator to fail to play the original expected effect and make its frequency unstable. It is prone to jitter, and even makes the phase-locked circuit fail to lock

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