A Variable Gain Amplifier for Wideband DCRs using 0.13μm CMOS Technology
نویسنده
چکیده
A wideband variable gain amplifier (VGA) design is introduced with two different schemes. It is based on a fully differential amplifier with resistive loads, and a Negative Miller Capacitance technique is used to increase the bandwidth of the amplifier. The amplifier consists of three stages, and the gain is varied through the second and third stages, where they are degenerated by a voltage controlled variable resistance. The design is ready to be implemented with MOSFETs using UMC 0.13μm technology. The supply voltage is 1.2V, and achieved gain is up to 35 dB with a minimum bandwidth of 1 GHz. Two design schemes are discussed, describing the tradeoff between the dynamic range of the variable gain and the bandwidth. Index Terms – Variable gain amplifier (VGA), negative miller capacitance.
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Department of Physics and Electronics, University of Science-VNU Hochiminh City, Vietnam; Faculty of Electrical and Electronics Engineering, University of Technology, VNU Hochiminh City, Vietnam; Department of Electrical and Computer Engineering, University of Saskatchewan, Saskatoon, Canada Corresponding Author: Nhan Nguyen ______________________________________________________________________...
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