amplitude control circuit

An amplitude control circuit and circuit technology, applied in the direction of automatic power control, electrical components, etc., can solve the problems of complex voltage control oscillator amplitude control circuit, and achieve simple structure, low power consumption, maximum power consumption and phase noise. good effect

Active Publication Date: 2022-04-29
SEMICON MFG INT (SHANGHAI) CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide an amplitude control circuit to solve the problem that the existing voltage-controlled oscillator and its amplitude control circuit are too complicated

Method used

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Embodiment Construction

[0050] The amplitude control circuit proposed by the present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments. Advantages and features of the present invention will be apparent from the following description and claims. It should be noted that all the drawings are in a very simplified form and use imprecise scales, and are only used to facilitate and clearly assist the purpose of illustrating the embodiments of the present invention.

[0051] The present invention provides an amplitude control circuit. The amplitude control circuit includes a voltage-controlled oscillator; a follower circuit is connected to the voltage-controlled oscillator, and the follower circuit is used to realize the output discharge current oscillating with the voltage-controlled oscillator. The oscillating signal output by the device changes and changes; the feedback regulation circuit is connected to the follower circuit, and the...

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Abstract

The invention provides an amplitude control circuit, including a voltage-controlled oscillator; a follower circuit connected to the voltage-controlled oscillator, and the discharge current output by the follower circuit changes with the oscillation signal output by the voltage-controlled oscillator; The feedback regulation circuit is connected with the follower circuit, and the feedback current output by the feedback regulation circuit changes with the change of the discharge current; the current mirror circuit is connected with the feedback regulation circuit, and the charging current output by the current mirror circuit changes with the change of the discharge current. The feedback current changes; the charge and discharge circuit is connected to the current mirror circuit and the follower circuit, and the current output by the charge and discharge circuit changes with the change of the charging current and the discharge current; the voltage controlled oscillator is connected to In the charging and discharging circuit, the oscillating signal changes with the change of the output current. The invention realizes the adjustment of the oscillation amplitude of the oscillation signal of the voltage-controlled oscillator, and all the circuits are analog circuits, the structure is simple, and the circuit power consumption is low.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an amplitude control circuit. Background technique [0002] RF transceivers are widely used in vehicle monitoring, remote control, telemetry, small wireless networks, industrial data acquisition systems, wireless tags, small wireless data terminals, biological signal acquisition, data communication, digital audio and digital image transmission and other fields. The frequency synthesizer provides the local oscillator signal and frequency modulation for the RF transceiver, and is a key circuit that determines the performance of the system. [0003] The voltage-controlled oscillator (VCO) is the core circuit in the frequency synthesizer. Its function is to generate oscillation signals of different frequencies under different voltages. The power consumption and phase noise of the voltage-controlled oscillator affect the power consumption and the frequency of the freque...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03L7/08H03L7/099
CPCH03L7/0802H03L7/099
Inventor 周曙光梁杰雄
Owner SEMICON MFG INT (SHANGHAI) CORP
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