Invention Grant
- Patent Title: Amplifier nonlinear offset drift correction
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Application No.: US16405568Application Date: 2019-05-07
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Publication No.: US10958227B2Publication Date: 2021-03-23
- Inventor: Quan Wan
- Applicant: Analog Devices, Inc.
- Applicant Address: US MA Norwood
- Assignee: Analog Devices, Inc.
- Current Assignee: Analog Devices, Inc.
- Current Assignee Address: US MA Norwood
- Agency: Schwegman Lundberg & Woessner P.A.
- Main IPC: H03F3/45
- IPC: H03F3/45 ; H03F1/30

Abstract:
An amplifier circuit comprises a differential input stage configured to receive a differential input signal, wherein the differential input stage is susceptible to an offset error that includes a linear offset error portion and a nonlinear offset error portion; and an offset error correction circuit coupled to the differential input stage and configured to apply a second order error correction signal to the differential input stage to reduce the nonlinear portion of the offset error.
Information query