Invention Grant
US07221227B2 Methods and apparatus for reducing output current oscillations of a driver provided with circuitry that senses and responds to excessive current draws of an output stage of the driver
有权
用于减少驱动器的输出电流振荡的方法和装置,该驱动器具有感测并响应驱动器的输出级的过大电流消耗的电路
- Patent Title: Methods and apparatus for reducing output current oscillations of a driver provided with circuitry that senses and responds to excessive current draws of an output stage of the driver
- Patent Title (中): 用于减少驱动器的输出电流振荡的方法和装置,该驱动器具有感测并响应驱动器的输出级的过大电流消耗的电路
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Application No.: US11147795Application Date: 2005-06-06
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Publication No.: US07221227B2Publication Date: 2007-05-22
- Inventor: Kah Weng Lee , Bin Zhang
- Applicant: Kah Weng Lee , Bin Zhang
- Applicant Address: SG Singapore
- Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
- Current Assignee: Avago Technologies ECBU IP (Singapore) Pte. Ltd.
- Current Assignee Address: SG Singapore
- Main IPC: H03F1/52
- IPC: H03F1/52

Abstract:
In one embodiment, a method is provided for reducing output current oscillations of a driver provided with i) a current sensing circuit that senses excessive current draws of an output stage of the driver, and ii) a feedback control circuit that reduces the excessive current draws. In accordance with the method, an output of the current sensing circuit is coupled to an input of a common source amplifier with source degeneration. The output of the common source amplifier is coupled to a node between an input stage and an amplification stage of the driver. The common source amplifier is configured to be activated when the current sensing circuit senses an excessive current draw of the output stage, at which time the feedback control circuit is also activated. Related apparatus is also disclosed.
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