Title :
A 5-GHz radio front-end with automatically Q-tuned notch filter and VCO
Author :
Rogers, John W M ; Plett, Calvin
Author_Institution :
Dept. of Electron., Carleton Univ., Ottawa, Ont., Canada
Abstract :
A low-voltage receiver front-end for 5-GHz radio applications is presented. The receiver consists of a low-noise amplifier (LNA) with notch filter, a voltage-controlled oscillator (VCO), and a mixer. The LNA/notch filter has an automatic Q-tuning circuit integrated with it to provide good image rejection. On-chip transformers are used extensively in the receiver to improve performance and facilitate low-voltage operation. The receiver has a gain of 19.8 dB, noise figure of 4.5 dB, a third-order input intercept point (IIP3) of -11.5 dBm, and an image rejection of 59 dB, and the VCO had a phase noise of -116 dBc/Hz at 1-MHz offset.
Keywords :
Q-factor; circuit tuning; low-power electronics; notch filters; radio receivers; voltage-controlled oscillators; 19.8 dB; 4.5 dB; 5 GHz; automatic Q-tuning circuit; image rejection; low-noise amplifier; low-voltage front-end; mixer; notch filter; on-chip transformer; phase noise; radio receiver; third-order input intercept point; voltage-controlled oscillator; wireless communication; Circuits; Frequency; Impedance; Low voltage; Low-noise amplifiers; Phase noise; Receivers; Resonator filters; Transformers; Voltage-controlled oscillators;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2003.815915
