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Active and Passive Combined Mixer for Low Flicker Noise and Low dc Offset

Title
Active and Passive Combined Mixer for Low Flicker Noise and Low dc Offset
Author
윤태열
Keywords
CMOS mixer; DC-offset; direct conversion; flicker noise; passive mixer
Issue Date
2015-07
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Citation
IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS, v. 25, NO 7, Page. 463-465
Abstract
A direct-conversion mixer with low flicker noise and low dc offset is presented for WLAN applications. The design consists of a folded-type active mixer with a resonant inductor in cascade with a source-driven passive mixer, operating at half the conventional LO frequency. Because of this unique topology, neither direct nor indirect flicker noise of the active mixer appears at the mixer output. Moreover, the dc offset voltage from the LO self-mixing is lowered, and the burden of designing a high-frequency VCO is relieved. The measurement results show a noise figure of 12.2 dB at 10 kHz, a conversion gain of 11.4 dB, and an IIP3 of -10.5 dBm while the mixer consumes 8.7 mW for a 1 V supply voltage. The design is implemented in a Dongbu Hitek 0.11 mu m CMOS process with a chip area of 1.3 x 0.98 mm(2).
URI
http://ieeexplore.ieee.org/abstract/document/7118255/?reload=truehttp://hdl.handle.net/20.500.11754/26565
ISSN
1531-1309; 1558-1764
DOI
10.1109/LMWC.2015.2429072
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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