Demystifying Switched Capacitor Circuits

Switched-Capacitor Data Converters

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In [27], an offset-insensitive multiply-by-two SC amplifi er that can complete one

multiplication within three clock cycles is reported. However, the reduction of con-

version time is made possible by including three instead of two capacitors in the SC

amplifi er.

Moreover, both of the previous multiply-by-two amplifi ers suffer from the effects

of the insuffi cient op-amp gain, or, equivalently, the fi nite op-amp gain. If the op-

amp gain is not suffi ciently large, the negative input terminal of the op-amp can no

longer be considered a virtual ground, and thus an additional gain error will occur.

Chin and Wu [28] ...