Invention Application
US20120242521A1 METHOD AND CIRCUIT FOR CONTINUOUS-TIME DELTA-SIGMA DAC WITH REDUCED NOISE
有权
具有减少噪声的连续时间DELTA-SIGMA DAC的方法和电路
- Patent Title: METHOD AND CIRCUIT FOR CONTINUOUS-TIME DELTA-SIGMA DAC WITH REDUCED NOISE
- Patent Title (中): 具有减少噪声的连续时间DELTA-SIGMA DAC的方法和电路
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Application No.: US13053303Application Date: 2011-03-22
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Publication No.: US20120242521A1Publication Date: 2012-09-27
- Inventor: Martin KINYUA
- Applicant: Martin KINYUA
- Applicant Address: TW Hsin-Chu
- Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
- Current Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING CO., LTD.
- Current Assignee Address: TW Hsin-Chu
- Main IPC: H03M3/02
- IPC: H03M3/02

Abstract:
A continuous-time delta-sigma digital-to-analog converter (DAC) includes a first delta-sigma modulator configured to quantize a most significant bit or bits of a digital input signal and produce a first quantization error signal, and a second multi-stage delta-sigma modulator configured to quantize less significant bits of the digital input signal. A first DAC is coupled to an output of the first delta-sigma modulator, and a second DAC is coupled to an output of the second noise-shaping filter. The second DAC has a greater resolution than the first DAC. A low pass output filter is coupled to a sum of an output of the first DAC and an output of the second DAC.
Public/Granted literature
- US08325074B2 Method and circuit for continuous-time delta-sigma DAC with reduced noise Public/Granted day:2012-12-04
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