Voltage-controlled oscillator, terminal equipment and signal tuning method

A voltage-controlled oscillator and signal technology, applied in the field of electronics, can solve problems such as phase noise affecting the quality of output signals

Pending Publication Date: 2021-05-18
BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

Excessive phase noise will seri...

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  • Voltage-controlled oscillator, terminal equipment and signal tuning method
  • Voltage-controlled oscillator, terminal equipment and signal tuning method
  • Voltage-controlled oscillator, terminal equipment and signal tuning method

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Embodiment Construction

[0054]Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatuses and methods consistent with aspects of the invention as recited in the appended claims.

[0055] figure 1 It is a schematic diagram of a circuit structure of a traditional voltage-controlled oscillator according to an exemplary embodiment. Such as figure 1 As shown, X1 is a piezoelectric oscillating device such as quartz crystal or piezoelectric ceramic or piezoelectric polymer material, which has a high Q value and can provide low phase noise and stable clock. D1 is a varactor dio...

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Abstract

The invention relates to a voltage-controlled oscillator, terminal equipment and a signal tuning method. The voltage-controlled oscillator comprises a voltage-controlled unit, a resonance unit and an oscillation circuit, the voltage-controlled unit comprises a voltage-controlled circuit connected with a first type of electrodes, the resonance unit comprises a resonance loop connected with a second type of electrodes, and the first type of electrodes and the second type of electrodes are coupled through a same dielectric medium; and the resonance unit is isolated from the voltage-controlled unit, is electrically connected with the oscillation circuit, and is used for tuning according to the parameter conversion of the first type of electrodes and the second type of electrodes and providing a resonated voltage-controlled signal for the oscillation circuit. The first type of electrodes and the second type of electrodes realize transmission of control characteristics and isolation of noise signals in a mode of influencing dielectric characteristics, so that the voltage-controlled unit is not connected with the resonance loop, the resonance unit is not influenced by noise of signals in the voltage-controlled unit when performing signal tuning, the resonance loop does not need to contain a semiconductor tuning device, and the phase noise of the whole voltage-controlled oscillator is effectively reduced.

Description

technical field [0001] The present disclosure relates to the field of electronic technology, and in particular to a voltage-controlled oscillator, terminal equipment and a signal tuning method. Background technique [0002] A voltage-controlled oscillator refers to an oscillator whose output frequency corresponds to the input control voltage, and whose frequency is a function of the input signal voltage. The working state of the oscillator or the component parameters of the oscillation circuit are controlled by the input control voltage. Voltage controlled oscillators are widely used in digital circuits and radio frequency circuits. The phase noise and frequency stability of the voltage-controlled oscillator are its most important indicators, which are the basis for providing high-precision sampling clocks for digital circuits and RF signals that generate high-precision and high-modulation performance for radio-frequency systems. Excessive phase noise will seriously affect...

Claims

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Application Information

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IPC IPC(8): H03B5/36
CPCH03B5/368
Inventor 石英官
Owner BEIJING XIAOMI MOBILE SOFTWARE CO LTD
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