Ultra-low power consumption voltage-controlled oscillator circuit and signal processing method thereof

Abstract

The invention discloses an ultra-low power consumption voltage-controlled oscillator circuit and a signal processing method thereof, which belong to the field of radio frequency integrated circuits. The method provided by the invention comprises the following steps of: 1) generating negative resistance by utilizing a cross coupling active module to compensate resistance in an LC-tank circuit, wherein an inductor in the LC-tank circuit is an off chip inductor; and 2) causing a differential oscillation signal of the LC-tank circuit to pass through an RC network in an RC orthogonal signal generation module, and outputting four paths of orthogonal signals. In the circuit provided by the invention, the two differential output ends of the cross coupling active module are connected with the two input ends of the RC orthogonal signal generation module and the two differential output ends of the LC-tank circuit; the inductor in the LC-tank circuit is the off chip inductor; and the two ends of the off chip inductor are connected with the two differential output ends of the LC-tank circuit. By the ultra-low power consumption voltage-controlled oscillator circuit and the signal processing method thereof, the power consumption and area of a chip can be reduced, and a frequency range can be widened at the same time; and the circuit has a simple structure.

Description

technical field [0001] The invention relates to an ultra-low power consumption voltage-controlled oscillator circuit and a signal processing method thereof, belonging to the field of radio frequency integrated circuits. Background technique [0002] With the reduction of the feature size and the increase of the complexity of the semiconductor process, the realization of the integrated circuit (IC) is facing many challenges: the speed is getting faster, the area is increasing, and the noise phenomenon is more serious. Among them, the problem of power consumption is particularly prominent. After entering 0.13um and 90nm technologies to save power, the power consumption density per unit area has risen sharply. Therefore, power consumption has become another key element after the traditional two elements of integrated circuits - speed and area. [0003] The mobile application market has an insatiable demand for low power consumption of radio frequency integrated circuits, makin...

AI Technical Summary

Problems solved by technology

The local oscillator (LO) signal output by a traditional VCO is locked by a phase-locked loop (PLL) loop to achieve a precise frequency. The power consumption is about 1mA, but in the application of ultra-low power consumption, the power consumption introduced by it is too large

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