Invention Grant
- Patent Title: Methods and structures for dynamically reducing DC offset
- Patent Title (中): 动态降低直流偏移的方法和结构
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Application No.: US14864607Application Date: 2015-09-24
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Publication No.: US09444405B1Publication Date: 2016-09-13
- Inventor: Chris C. Dao , Stefano Pietri
- Applicant: FREESCALE SEMICONDUCTOR, INC.
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- Main IPC: H03M1/10
- IPC: H03M1/10 ; H03F1/02 ; H03F3/45 ; H03F1/30
Abstract:
An amplifier system includes a low offset amplifier having a first signal input, a second signal input, an output, a resistive digital to analog converter (RDAC) coupled between a first amplifying terminal and a second amplifying terminal of the amplifier that provides offset control, and a current supply coupled to the RDAC. The amplifier system further includes a low offset amplifier having a first signal input, a second signal input, an output, a resistive digital to analog converter coupled between a first amplifying terminal and a second amplifying terminal of the amplifier that provides offset control, and a current supply coupled to the RDAC. The amplifier system also further includes a load coupled to the output and to the second input of the amplifier and a controller coupled to the RDAC that provides an offset control of the first and second inputs by controlling the RDAC.
Information query
