60GHz PLL Low Phase Noise Self-injection Voltage Controlled Oscillator and Wireless Transceiver

Abstract

The invention discloses a 60 GHz phase-locked loop low-phase-noise self-injection voltage-controlled oscillator and a wireless transceiver. The voltage-controlled oscillator includes: a plurality of identical LC oscillators, in which a negative resistance pair is composed of NMOS devices; a resonant cavity composed of accumulative varactors and inductors; an output buffer circuit composed of NMOS devices, inductors and capacitors; A self-injection circuit consisting of capacitors; the parasitic capacitance of the LC oscillator is made the same by NMOS devices. By adopting the same oscillator core and injecting its oscillation signals into corresponding resonant cavities mutually. Through the principle of injection locking, the resonant cavity circuit will be locked at the same operating frequency point, and the phase of the output waveform will also be synchronized. At this time, through the superposition of waveforms, the power of the local oscillator frequency in the output waveform is strengthened, and the filtering effect of the noise through the LC resonator does not increase significantly, so the phase noise output by the voltage-controlled CMOS oscillator can be significantly reduced, and at the same time, the voltage-controlled The FOM value of the oscillator.

Description

technical field [0001] The invention relates to the field of integrated circuit design, in particular to a low-phase-noise self-injection-locked voltage-controlled CMOS LC oscillator used for a 60 GHz phase-locked loop at low voltage. Background technique [0002] With the vigorous development of modern wireless communication technology, our requirements for data transmission rate are getting higher and higher. In the wireless communication frequency band, the 60 GHz frequency band has two characteristics: high carrier frequency and large available bandwidth. In the 60GHz frequency band, people can easily increase the transmission rate to 1Gbps-10Gbps, meeting the industry's requirements for transmission rates. This has also promoted the research and development of low-cost, low-power 60 GHz CMOS wireless transceivers. In a 60 GHz transceiver, a 60 GHz PLL is an essential module. The performance of the phase-locked loop affects the performance of the entire transceiver, a...

AI Technical Summary

Problems solved by technology

These processes have small parasitic capacitance, low substrate loss, fast device operation, and better improvement in the output phase noise of the voltage-controlled oscillator. Processing chip integration

[0007] In summary, when the operating frequency is 60 GHz, it is difficult for the traditional CMOS voltage controlled oscillator circuit based on LC structure to obtain lower phase noise at low voltage

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