Voltage-controlled oscillation circuit and voltage-controlled oscillator

Abstract

The embodiment of the invention belongs to the technical field of radio frequency, and provides a voltage-controlled oscillation circuit and a voltage-controlled oscillator. An initial oscillation signal is generated through a tuning oscillation module, a current source module is adopted to carry out feedback coupling processing on the initial oscillation signal and reduce the low-frequency flicker noise in the initial oscillation signal, and the signal amplification processing is carried out on the initial oscillation signal through a buffer module to output a corresponding buffer isolation oscillation signal, and the energy injection is carried out on the buffer isolation oscillation signal by adopting a bias device module according to the bias voltage signal to output the correspondingoscillation output signal, so that the purpose of eliminating the noise of a low frequency band is achieved, and the problem that the stability of the output frequency of the voltage-controlled oscillator is greatly influenced due to the fact that an existing CMOS voltage-controlled oscillator is limited by the process level and the noise at the low frequency band is higher, is solved.

Description

technical field [0001] The embodiments of the present application belong to the field of radio frequency technology, and in particular relate to a voltage-controlled oscillation circuit and a voltage-controlled oscillator. Background technique [0002] At present, with the development of millimeter wave and terahertz technology, millimeter wave and terahertz have broad application prospects in the fields of communication, electronic countermeasures, radar, electromagnetic weapons, astronomy, medical imaging, nondestructive testing, environmental monitoring and safety inspection. . As the core module of the wireless communication system, the on-chip frequency source chip usually has many implementation methods. For example, the voltage-controlled oscillator is one of the key modules in the transceiver system, and it is used as a local frequency source for frequency up-conversion or down-conversion , in the design of CMOS voltage-controlled oscillators, the cross-coupled pair...

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Problems solved by technology

[0004] The embodiment of the present application provides a voltage-controlled oscillator circuit and a voltage-controlled oscillator, aiming to solve the problem that the existing CMOS voltage-controlled oscillator is limited by the technological level, and the noise in the low-frequency band is high, which greatly affects the voltage-controlled Oscillator output frequency stability issues

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