Current multiplexing voltage-controlled oscillator based on grid-source transformer feedback

Abstract

The invention belongs to the technical field of communication, and relates to a current multiplexing voltage-controlled oscillator, in particular to a current multiplexing voltage-controlled oscillator based on grid-source transformer feedback, which is used for solving the problems of poor phase noise of a traditional voltage-controlled oscillator in a high frequency band, large occupied area, high power consumption and the like of a traditional self-mixing oscillator chip. The frequency mixer comprises a voltage-controlled oscillator fed back by a gate-source transformer, a frequency mixer body and a blocking capacitor. According to the voltage-controlled oscillator fed back by the gate-source transformer, the requirement for the power supply voltage is reduced, a high-performance working state can still be kept at a low voltage, and power consumption is reduced; and moreover, the even harmonic current of the voltage-controlled oscillator fed back by the gate-source transformer and the single balanced mixer are subjected to current multiplexing, so that the loss is reduced, the utilization rate of the current is improved, and the occupied area of a chip is remarkably reduced.

Description

technical field [0001] The invention belongs to the technical field of communication, and relates to a current multiplexing voltage-controlled oscillator, in particular to a current multiplexing voltage-controlled oscillator based on grid-source transformer feedback. Background technique [0002] With the rapid development of the Internet of Things and wireless communication technology, people put forward a series of requirements for the RF transceiver system, such as higher frequency, smaller size, lower power consumption, and higher reliability. As one of the cores of the RF transceiver module, The performance of a voltage-controlled oscillator (Voltage-Controlled Oscillator, VCO) directly affects the accuracy of signal transmission and reception, so the VCO is facing great demands and challenges. As the design frequency increases, the quality factor (Q value) of the passive components decreases, resulting in poor output phase noise performance of the VCO. [0003] In ord...

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Problems solved by technology

[0004] The purpose of the present invention is to provide a current-multiplexed voltage-controlled oscillator based on gate-source transformer feedback to solve the phase noise difference of traditional voltage-controlled oscillators in the high frequency band, and the traditional self-mixing oscillator chip occupies a large area , high power consumption and other issues

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