Invention Grant
US07656226B2 Switched capacitor equalizer with offset voltage cancelling 失效
开关电容均衡器,具有失调电压消除

Switched capacitor equalizer with offset voltage cancelling
Abstract:
An embodiment may be described as a switched capacitor analog equalizer circuit with offset voltage cancellation, where an embodiment comprises an amplifier in which a feedback path from its output port to one of its input ports is provided during a reset phase, and where the amplifier's input port connected to the feedback path is also connected to one terminal of an offset-correction capacitor and one terminal of a sampling capacitor. The other terminal of the offset-correction capacitor is connected to a switch and the other terminal of the sampling capacitor is connected to an input port to receive a signal. During the reset phase, the switch is open, and during a sampling phase, the switch is closed so that the offset-correction capacitor and the sampling capacitor are connected in parallel. Other embodiments are described and claimed.
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