Micropower Class-AB VGA With Gain-Independent Bandwidth

  title={Micropower Class-AB VGA With Gain-Independent Bandwidth},
  author={Coro Garcia-Alberdi and Jes{\'u}s Aguado Ruiz and Antonio J. L{\'o}pez-Mart{\'i}n and Jaime Ramx00EDrez-Angulo},
  journal={IEEE Transactions on Circuits and Systems II: Express Briefs},
A novel class-AB variable gain amplifier with constant bandwidth and continuous gain tuning is presented. It is based on the cascade connection of a tunable transconductor and a transresistance amplifier. Class-AB operation is achieved using quasi-floating gate transistors. The circuit has been fabricated in a 0.5- μm CMOS technology, showing a third-order input intercept point (IIP3) of 13 dBV p for a power consumption of 500 μW. 


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A simple approach for the implementation of CMOS amplifiers with constant bandwidth independent of gain

  • L. Acosta, G. Carvajal, J. Ramirez-Angulo, J. Lopez-Martin
  • Proc. IEEE ISCAS, 2008, pp. 292–295.
  • 2008
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