Narrowband analog to digital converter with suppressed second-order distortion
US6469649B1 · kind B1 · utility
28Cited by
17References
31Claims
0Family size
Assignee
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Key dates
| Filing date | Mar 8, 2000 |
| Grant date | Oct 22, 2002 |
| Priority date | — |
| Expiry date | Mar 8, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F7/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An apparatus for digitizing an analog electrical signal comprises a linearized sampler having an analog electrical input and a sampling input, a bandpass filter having a center frequency of at least half of the quantization rate of a quantizer in communication with the sampler, and the quantizer in communication with the bandpass filter. The linearized sampler in one embodiment is a linearized optical modulator with an optical input. The sampler frequency in another embodiment is chosen such that second-order distortion products generated in the sampler are separated in frequency from the sampled input band.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.