Photonic filter bank for high-speed analog-to-digital conversion
US7973688B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 28, 2008 |
| Grant date | Jul 5, 2011 |
| Priority date | — |
| Expiry date | Aug 28, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F7/00
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An analog to digital converter (ADC) structure and method includes a photonic filter bank having at least two filters. The at least two filters are configured to create a corresponding spectral tributary from an input signal at a target rate, and the at least two filters are configured to exhibit orthogonality properties between respective tributaries. An optical/electrical (O/E) converter is coupled to each of the at least two filters in a respective spectral tributary to convert an optical input to an electrical output. An analog to digital converter (ADC) is coupled to each of the O/E converters in a respective spectral tributary to sample the electrical output at a fraction of a target rate and to convert a sampled analog electrical output into a digital signal. A synthesis filter is coupled to each of the ADCs in a respective spectral tributary to reconstruct the input signal digitally at the target rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.