A voltage-controlled oscillator, integrated chip and electronic equipment

A voltage-controlled oscillator and circuit technology, applied to power oscillators, electrical components, etc., can solve the problem of low precision of the oscillation cycle
CN109286369BActive Publication Date: 2020-10-09GREE ELECTRIC APPLIANCES INC
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Patent Information

Authority / Receiving Office
CN ยท China
Patent Type
Patents(China)
Current Assignee / Owner
GREE ELECTRIC APPLIANCES INC
Publication Date
2020-10-09

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Abstract

The invention relates to the technical field of integrated circuits, in particular, to a voltage-controlled oscillator, an integrated chip, and an electronic device. The voltage-controlled oscillatorcomprises a resistor unit, a current mirror unit, a bias unit, and an oscillating unit. The current mirror unit responds to a first bias voltage provided by the bias unit to carries out bias processing on a voltage of a first node at a first current path and a voltage of a third node at a third current path to generate a first bias voltage and is also used for responding to resistance configuration of the resistor unit and adjusting a third current flowing through the third current path, wherein the first current flowing through the first current path is equal to the third current. Therefore,with configuration of the resistance corresponding to the resistor unit, the charging and discharging time of the capacitor of the oscillating unit can be indirectly adjusted to change the oscillationperiod of the oscillating unit and thus the changed oscillation period is closer to a desired oscillation period, so that the output accuracy of the oscillation period is improved.
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Description

technical field

[0001] The invention relates to the technical field of integrated circuits, in particular to a voltage-controlled oscillator, an integrated chip and electronic equipment. Background technique

[0002] A voltage-controlled oscillator (VCO) refers to an oscillating circuit whose output frequency corresponds to an input control voltage, and is widely used in electronic devices. Voltage-controlled oscillators include LC voltage-controlled oscillators, RC voltage-controlled oscillators, and crystal voltage-controlled oscillators.

[0003] The traditional technology superimposes a controllable source on the ring RC voltage controlled oscillator to realize the linear control of the output frequency by the input control voltage.

[0004] In the process of realizing the present invention, the inventor found that the existing related technology has the following problems: because the oscillation unit of each stage of the traditional RC voltage-controlled oscillator is...

Claims

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