System and Method for a Controlled Feedback Charge Pump

摘要

According to various embodiments, a circuit includes a charge pump and a feedback circuit. The charge pump includes a first input, a second input configured to receive an offset signal, and an output terminal configured to provide a charge pump signal based on the first and second inputs. The feedback circuit includes a first input coupled to the output of the charge pump, a second input configured to be coupled to a reference signal, an enable input configured to enable and disable the feedback circuit, and a feedback output coupled to the first input of the charge pump.

主权项

1. A transducer system comprising:
a microelectromechanical systems (MEMS) transducer comprising a first terminal and a second terminal; a charge pump coupled to the first terminal, the charge pump configured to receive an offset signal and provide a charge pump voltage signal to the first terminal; a feedback circuit coupled to the first terminal and configured to
receive the charge pump voltage signal, a first control signal, and a reference signal,generate a second control signal based on the charge pump voltage signal and the reference signal, andprovide the second control signal to the charge pump; and an amplifier coupled to a second terminal of the MEMS transducer, wherein the second terminal is configured to receive the offset signal.