Low-Power Linear Variable Gain Amplifier
نویسنده
چکیده
This paper presents a low-power linear variable gain amplifier (VGA). This VGA gains its low-power linear properties with the help of the local feedback auxiliary (LFA) amplifier. The core of this LFA amplifier is based on flipped voltage follower (FVF) circuit. This VGA provides the flexibility to tune its gain with dual tuning voltages. Gain range of 15 dB to 16 dB with maximum bandwidth of 22 MHz can be provided by VGA. It exhibits a maximum power consumption of 74 μW from a supply voltage of 1.2 V. This VGA shows a minimum total harmonic distortion (THD) of −40 dB at input signal of 400 mVpp of 1 MHz. Simulation results based on 90-nm CMOS technology are presented to demonstrate the performance of the proposed VGA.
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