A Precise Decibel-Linear Programmable Gain Amplifier Using a Constant Current-Density Function

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In this paper, a compensation technique for realizing a precise decibel-linear CMOS programmable gain amplifier (PGA) is described. The proposed PGA, employing an auxiliary pair, not only retains a constant current density but also offers a gain-independent bandwidth (BW). For verification, a compact PGA (0.1 mm(2)) is fabricated using a 0.13-mu m CMOS process and measured. The measured gain control range is from -16 to +32 dB with 6-dB steps, while the error deviation of the gain is less than 0.35 dB. A constant 3-dB BW of 60 MHz and an input P-1dB of -35 to -5 dBm are obtained, while dissipating a lower power of 1.2 mW under a 1-V supply.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2012-09
Language
English
Article Type
Article
Citation

IEEE TRANSACTIONS ON MICROWAVE THEORY AND TECHNIQUES, v.60, no.9, pp.2843 - 2850

ISSN
0018-9480
DOI
10.1109/TMTT.2012.2203928
URI
http://hdl.handle.net/10203/103322
Appears in Collection
EE-Journal Papers(저널논문)
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