A Harmonic-Rejecting CMOS LNA for Broadband Radios

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 frequen...

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Bibliographic Details
Published in:IEEE journal of solid-state circuits 2013-04, Vol.48 (4), p.1072-1084
Main Authors: Joung Won Park, Razavi, B.
Format: Article
Language:English
Subjects:
Amplifiers
Applied sciences
Broadband communication
Broadband LNA
Capacitors
Circuit properties
Design. Technologies. Operation analysis. Testing
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Feedforward neural networks
Frequency response
Hardware
Harmonic analysis
harmonic rejection
harmonic-rejecting LNA
Input-output equipment
Integrated circuits
Mixers
notch filter
Oscillators, resonators, synthetizers
Receivers
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
widely tunable filter
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Description
Summary: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.
ISSN:0018-9200
1558-173X
DOI:10.1109/JSSC.2013.2237651