发明授权
US6121909A One bit digital to analog converter with feedback across the discrete
time/continuous time interface
失效
一个位数字到模拟转换器,具有跨越离散时间/连续时间接口的反馈
- 专利标题: One bit digital to analog converter with feedback across the discrete time/continuous time interface
- 专利标题(中): 一个位数字到模拟转换器,具有跨越离散时间/连续时间接口的反馈
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申请号: US89488申请日: 1998-06-02
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公开(公告)号: US6121909A公开(公告)日: 2000-09-19
- 发明人: Wai Laing Lee , Axel Thomsen , Lei Wang , Dan Kasha
- 申请人: Wai Laing Lee , Axel Thomsen , Lei Wang , Dan Kasha
- 申请人地址: TX Austin
- 专利权人: Cirrus Logic, Inc.
- 当前专利权人: Cirrus Logic, Inc.
- 当前专利权人地址: TX Austin
- 主分类号: H03M3/02
- IPC分类号: H03M3/02 ; H03M1/66
摘要:
A 1-bit digital to analog converter uses both discrete time and continuous time processing to produce an analog output signal. The analog output signal is sampled and fed back across the discrete time/continuous time interface to the input of the conversion circuit. In one implementation, the discrete time processing uses an integrator chain of switched capacitor integrators and a switched capacitor low pass filter. The continuous time processor is a 2 pole low pass filter. A finite impulse response filter can precede the discrete time processing. A plurality of analog output sampling arrangements can be selectively applied accommodate a variety of operational conditions.
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