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A 50-MHz dB-linear programmable-gain amplifier with 98-dB dynamic range and 2-dB gain steps for 3 V power supply

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2 Author(s)
Kyung-Suc Nah ; Samsung Electron. Co. Ltd., Kyungki-Do, South Korea ; Byeong-Ha Park

A programmable-gain amplifier (PGA) circuit introduced in this paper has a dynamic gain range of 98 dB with 2 dB gain steps and is controlled by 6-bit gain control bits for a 3 V power supply. It has been fabricated in a 0.5 /spl mu/m 15 GHz f/sub T/ Si BiCMOS process and draws 13 mA. The active die area taken up by the circuit is 400 /spl mu/m /spl times/ 1170 /spl mu/m. A noise figure (NF) of 4.9 dB was measured at the maximum gain setting. In addition, an analysis of the bias current generation to provide dB-linear gain control is presented.

Published in:

Very Large Scale Integration (VLSI) Systems, IEEE Transactions on  (Volume:11 ,  Issue: 2 )