Invention Application
US20020024382A1 Switched-capacitor, common-mode feedback circuit for a differential amplifier without tail current 有权
开关电容,共模反馈电路,用于不带尾电流的差分放大器

Switched-capacitor, common-mode feedback circuit for a differential amplifier without tail current
Abstract:
Provided is a switched capacitor feedback circuit including two or more input ports configured to receive a corresponding a number of input signals and at least one output port. The output port is configured to output an adjusting signal. The input signals includes a number of primary signals and two or more reference signals that are associated with a first timing phase of operation. The adjusting signal is produced based upon a comparison between the primary signals the reference signals. Also provided is a pair of active devices having gates coupled together and structured to receive the adjusting signal. The active devices are configured to provide a gain to the adjusting signal in accordance with a predetermined gain factor, and facilitate an adjustment to the number of primary signals based upon the gain during a second timing phase of operation.
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