Invention Grant
- Patent Title: Adaptive high-order digital-to-analog conversion
- Patent Title (中): 自适应高阶数模转换
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Application No.: US12027132Application Date: 2008-02-06
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Publication No.: US07825844B2Publication Date: 2010-11-02
- Inventor: Gary John Ballantyne
- Applicant: Gary John Ballantyne
- Applicant Address: US CA San Diego
- Assignee: QUALCOMM Incorporated
- Current Assignee: QUALCOMM Incorporated
- Current Assignee Address: US CA San Diego
- Agent Jiayu Xu
- Main IPC: H03M1/66
- IPC: H03M1/66

Abstract:
Techniques for performing digital-to-analog conversion with first-order or higher-order hold using a simple analog circuit for signal reconstruction and employing feedback control techniques are described. In one design, a digital-to-analog conversion circuit includes an inverse model circuit, a feedback circuit, a zero-order hold (ZOH) circuit, and an analog circuit. The inverse model circuit processes a digital input signal and provides a first digital signal. The feedback circuit receives the first digital signal and an analog output signal from the analog circuit, performs low frequency noise filtering, and provides a second digital signal. The ZOH circuit converts the second digital signal from digital to analog with zero-order hold and provides an analog input signal for the analog circuit. The analog circuit operates on the analog input signal and provides the analog output signal. The analog circuit may be a simple circuit having one or more poles.
Public/Granted literature
- US20090195426A1 ADAPTIVE HIGH-ORDER DIGITAL-TO-ANALOG CONVERSION Public/Granted day:2009-08-06
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