发明授权
- 专利标题: Arrangement for and method of concurrent quadrature downconversion input sampling of a bandpass signal
- 专利标题(中): 带通信号并行正交下变频输入采样的布置和方法
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申请号: US126847申请日: 1993-09-24
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公开(公告)号: US5454007A公开(公告)日: 1995-09-26
- 发明人: Santanu Dutta
- 申请人: Santanu Dutta
- 申请人地址: CA Seal Beach
- 专利权人: Rockwell International Corporation
- 当前专利权人: Rockwell International Corporation
- 当前专利权人地址: CA Seal Beach
- 主分类号: H03D3/00
- IPC分类号: H03D3/00 ; H03K9/06
摘要:
An arrangement for generating a digital, downconverted complex baseband signal from a bandpass signal comprises a signal source for providing first and second clock signals at first and second clocking rates, respectively. The first clocking rate is at four times the expected center frequency of the bandpass signal, and the second clocking rate is at an exact subharmonic frequency of the bandpass frequency. The bandpass signal is sampled by a composite sampling event of two sampling pulses which occur once during each period of the second clocking signals and which are time-spaced from each other by the inverse of the first clocking rate. The complex baseband samples are ready as an A/D converter output, with no requirement for DSP processing to complete the downconversion to zero-IF.
公开/授权文献
- US6043468A Carbon heater 公开/授权日:2000-03-28