Invention Grant
US07675446B2 Filter applied in sigma-delta modulator and filtering method thereof
有权
滤波器应用于Σ-Δ调制器及其滤波方法
- Patent Title: Filter applied in sigma-delta modulator and filtering method thereof
- Patent Title (中): 滤波器应用于Σ-Δ调制器及其滤波方法
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Application No.: US12032527Application Date: 2008-02-15
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Publication No.: US07675446B2Publication Date: 2010-03-09
- Inventor: Chang Shun Liu
- Applicant: Chang Shun Liu
- Applicant Address: TW Hsinchu
- Assignee: Realtek Semiconductor Corp.
- Current Assignee: Realtek Semiconductor Corp.
- Current Assignee Address: TW Hsinchu
- Agency: Quintero Law Office
- Priority: TW96105602A 20070215
- Main IPC: H03M1/66
- IPC: H03M1/66
Abstract:
A filter applied in a sigma-delta modulator includes an integrator, a signal attenuator and a feedback circuit, in which these components are connected in series sequentially to form a local feedback circuit. The integrator integrates an input signal to output an integral signal. Accordingly, the signal attenuator attenuates the integral signal to output an attenuation signal to the local feedback circuit so as to share a part of attenuation amount to reduce the chip area of the sigma-delta modulator.
Public/Granted literature
- US20080198052A1 FILTER APPLIED IN SIGMA-DELTA MODULATOR AND FILTERING METHOD THEREOF Public/Granted day:2008-08-21
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