In VGA, we control the gain with four bits control words and these 16 gain steps are linear-in-dB.At the output of the VGA, an on-chip balun is employed for differential-to-single conversion.

• 最后再于可变增益放大器之输出端接上整合变压器将电路之双端输出改为单端的讯号，以方便将来接上功率放大器。