发明名称 |
Frequency modulation-based folding optical analog-to-digital-converter |
摘要 |
<p>A frequency modulation-based optical analog-to-digital converter utilizes a downward-folding, successive approximation approach. A series of stages is utilized to generate bits in the digital signal. In each stage, complementary low and high bandpass filters collectively cover a bandpass frequency range from a low frequency to a high frequency. The high frequency filtered signal from the high bandpass filter is observed to obtain a bit in the digital word. By performing the folding operations in the frequency domain, the converter avoids the difficult task of optical power subtraction, relying instead on frequency down-conversions. The high frequency filtered signal passed by the high bandpass filter is then downconverted and added to the low pass filter signal to generate a modulated signal for the next stage.</p> |
申请公布号 |
EP0985955(A1) |
申请公布日期 |
2000.03.15 |
申请号 |
EP19990113667 |
申请日期 |
1999.07.15 |
申请人 |
TRW INC. |
发明人 |
FIELDS, RICHARD A.;ROLLINS, DAVID L.;PERKINS, STEPHEN R.;UPTON, ERIC L.;KUNKEE, ELIZABETH T.;LEMBO, LAWRENCE J.;CARILLO, JUAN C. JR.;KINTIS, MARK |
分类号 |
G02F7/00;(IPC1-7):G02F1/35;H01Q3/26 |
主分类号 |
G02F7/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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