Method and system for providing a digital signal representing an analog signal
US7304591B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 11, 2004 |
| Grant date | Dec 4, 2007 |
| Priority date | — |
| Expiry date | Aug 11, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L7/00
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method for providing a digital output signal (59) representing an analog input signal (54) in a system (50) including an analog circuit (51) and a control unit (52). Analog circuit (51) preferably features high bandwidth, high gain, and low current consumption. Analog circuit (51) is preferably implemented with low accuracy components. Control unit (52) keeps error outputs (55) of analog circuit (51) at a minimal value so that control unit (52) cancels analog input signal(54) by outputting discrete value signals (58) in a feedback loop as input (58) to analog circuit (51). A DSP (53) of system (50) is previously trained using known analog signals and a model relating inputs (54,58) to error outputs (55) of analog circuit (51) is previously known. During operation, a digital representation (57) of the discrete value signals (58) is fed to DSP (53) that reconstructs analog input signal (54) by knowing from the prior training the effect of control unit (52) and the model of analog circuit (51).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.