Invention Grant
- Patent Title: Using offset cancellation circuit to mitigate beat-frequency oscillation of phase currents in a multiphase interleaved voltage regulator
- Patent Title (中): 使用偏移消除电路来减轻多相交错电压调节器中相电流的拍频振荡
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Application No.: US13018628Application Date: 2011-02-01
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Publication No.: US08525497B2Publication Date: 2013-09-03
- Inventor: Chen-Hua Chiu , Ching-Jan Chen , Dan Chen , Wei-Hsu Chang
- Applicant: Chen-Hua Chiu , Ching-Jan Chen , Dan Chen , Wei-Hsu Chang
- Applicant Address: TW Hsinchu
- Assignee: Rickhtek Tecnology Corp.
- Current Assignee: Rickhtek Tecnology Corp.
- Current Assignee Address: TW Hsinchu
- Agency: Rosenberg, Klein & Lee
- Priority: TW99103356A 20100204
- Main IPC: G05F1/59
- IPC: G05F1/59
Abstract:
For a multiphase interleaved voltage regulator, an offset cancellation circuit is applied for each phase separately. The current loop gain of each phase is thus increased to mitigate the beat-frequency oscillation in phase currents when the beat frequency is below the bandwidth of the low-pass filter in the offset cancellation circuit, without introducing additional instability issue that is the drawback of increasing current-sensing gain.
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