Invention Grant
US08274415B2 Sigma-delta modulator apparatus and method of generating a modulated output signal
有权
Σ-Δ调制器装置和产生调制输出信号的方法
- Patent Title: Sigma-delta modulator apparatus and method of generating a modulated output signal
- Patent Title (中): Σ-Δ调制器装置和产生调制输出信号的方法
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Application No.: US12866248Application Date: 2008-02-13
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Publication No.: US08274415B2Publication Date: 2012-09-25
- Inventor: Hassan Ihs , Frederic Schrive
- Applicant: Hassan Ihs , Frederic Schrive
- Applicant Address: US TX Austin
- Assignee: Freescale Semiconductor, Inc.
- Current Assignee: Freescale Semiconductor, Inc.
- Current Assignee Address: US TX Austin
- International Application: PCT/IB2008/051780 WO 20080213
- International Announcement: WO2009/101486 WO 20090820
- Main IPC: H03M3/00
- IPC: H03M3/00
Abstract:
A discrete time sigma-delta modulator apparatus for class-D operation comprises a feed-forward path having an input at one end thereof and an output at another end thereof. A first summation unit is coupled in the feed-forward path to a first integrator. A quantizer is coupled in the feed-forward path after the first integrator and a feedback path arrangement is coupled to an input of the first summation unit. A low pass filter is arranged in the feedback path arrangement so as only to drive the first integrator.
Public/Granted literature
- US20110006938A1 SIGMA-DELTA MODULATOR APPARATUS AND METHOD OF GENERATING A MODULATED OUTPUT SIGNAL Public/Granted day:2011-01-13
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