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In this paper, a low-power CMOS variable gain amplifier (VGA) with an approximated exponential equation is presented. The proposed VGA is composed of two cascaded variable gain stages and a fixed gain stage, and has advantages of low-power, wide controlled gain range and temperature independent. The VGA is implemented in 0.18 um CMOS technology. The simulations show that a total linear gain range...
A low-power variable-gain amplifier (VGA) with integrated received signal strength indicator (RSSI) for a low data-rate impulse radio ultra-wideband (IR-UWB) receiver is designed and implemented in a CMOS 0.18 ??m technology. The VGA achieves a gain range from -9 dB to 63 dB and bandwidth from 31 to 187 MHz. An input P1dB of -15.4 dBm is achieved at zero-dB gain. The RSSI has a dynamic range more...
In this paper, a low-power CMOS variable gain amplifier (VGA) with dB-linear gain, which is based on an approximated exponential equation is presented. Being designed for GPS application, the proposed VGA is composed of two cascaded variable gain stages and a fixed gain stage, and has advantages of low-power, wide controlled-gain-range and highly-linear. The VGA is implemented in 0.18 ??m CMOS technology...
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