Title :
A Harmonic-Rejecting CMOS LNA for Broadband Radios
Author :
Park, Joung Won ; Razavi, Behzad
Author_Institution :
Electrical Engineering Department, University of California, Los Angeles,
Abstract :
The local oscillator harmonics corrupt the desired signal in broadband RF receivers by downconverting interferers. This paper proposes the notion of harmonic rejection in the front-end low-noise amplifier so as to relax the stringent matching required of harmonic-reject mixers. Described are frequency response shaping techniques by feedforward and unilateral Miller capacitance multiplication for a signal bandwidth of 100 MHz to 10 GHz. A calibration algorithm is also proposed for the tuning of the frequency response. An experimental prototype fabricated in 65-nm digital CMOS technology provides at least 20 dB of rejection while consuming 8.64 mW with a 1.2-V supply.
Keywords :
Broadband communication; Capacitors; Feedforward neural networks; Frequency response; Harmonic analysis; Mixers; Receivers; Broadband LNA; harmonic rejection; harmonic-rejecting LNA; notch filter; widely tunable filter;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2013.2237651
