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III C YCLICALLY CHARGED FIA A Operation and Stably Controllable Amplifier Bias P
提出新型CC-FIA,通过分时充电小电容组替代传统大电容,实现稳定可控的放大器偏置。
NC-OVL, NSW, CRES, fSW, IS, VT, VOV等参数控制
CC-FIA开关电容放大器偏置浮动电流源电容切换
▸将传统FIA中的大单电容分解为多个小电容,总电容显著减小
▸采用开关电容操作,交替连接电容至放大器,实现浮动电流源功能
▸通过电容切换操作实现放大器偏置点的稳定控制
Abstract
operating principle
of a new FIA called CC-FIA. The large single reservoir
capacitor in the conventional FIA is divided into several small
capacitors whose total capacitance is significantly smaller than
one in the conventional FIA. In the reset phase, all the reser-
voir capacitors are charged to VDD. During the amplification
phase, the reservoir capacitors are alternately connected to
the amplifier to sequentially supply charge. The discharged
capacitors are alternately recharged during the ne