Offset compensation in a track and hold circuit
Shirin Pourashraf, Jaime Ramirez‐Angulo, Alfonso R. Cabrera-Galicia, Antonio J. López‐Martín, R.G. Carvajal · 2017
Using a new DC offset compensation method, a fully differential track and hold circuit is presented. It stores an amplified version of the offset during the hold phase, which is used in attenuated fashion during the track phase to compensate offset. This scheme is less sensitive to charge injection and other errors than conventional offset compensation schemes. Experimental results of a test chip in 180 nm CMOS technology verify the proposed scheme.