发明授权
US08890634B2 Multiplexed configurable sigma delta modulators for noise shaping in a 25-percent duty cycle digital transmitter
有权
用于25％占空比数字发射机中的噪声整形的多路复用可配置Σ-Δ调制器
- 专利标题： Multiplexed configurable sigma delta modulators for noise shaping in a 25-percent duty cycle digital transmitter
- 专利标题（中）： 用于25％占空比数字发射机中的噪声整形的多路复用可配置Σ-Δ调制器
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申请号： US13661412申请日： 2012-10-26
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公开(公告)号： US08890634B2公开(公告)日： 2014-11-18
- 发明人: Dennis Mahoney , Bernard Ginetti , Zhongxuan Zhang , Khurram Muhammad , Chih-Ming Hung , Ming-Yu Hsieh
- 申请人： MStar Semiconductor, Inc.
- 申请人地址： TW Hsinchu Hsien
- 专利权人： MStar Semiconductor, Inc.
- 当前专利权人： MStar Semiconductor, Inc.
- 当前专利权人地址： TW Hsinchu Hsien
- 代理机构： Edell, Shapiro & Finnan, LLC
- 主分类号： H04L27/36
- IPC分类号： H04L27/36 ; H03C5/00
摘要：
A modulator generates a baseband digital signal from an information-bearing digital signal. The baseband signal has time-varying phase and amplitude defined by a sequence of complex data words, each having an in-phase (I) component and a quadrature (Q) component. A noise-shaping modulator generates a noise-shaped digital signal from the baseband digital signal such that quantization noise in the noise-shaping modulator is attenuated by a spectral null of its noise transfer function. The spectral null is selected by a noise-shaping parameter corresponding to a selected one of a plurality of output frequencies. A signal converter generates an analog signal conveying the information of the information-bearing digital signal on an analog carrier signal having the selected output frequency.
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