Circuits and methods for gain ranging in an analog modulator and systems using the same
US6204787A · kind A · utility
27Cited by
15References
20Claims
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Inventor
Key dates
| Filing date | Mar 31, 1999 |
| Grant date | Mar 20, 2001 |
| Priority date | — |
| Expiry date | Mar 31, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/448
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Analog modulator circuitry 401 includes an integrator 707. First switched capacitor circuitry 710, 711, 713, 714 selectively samples a first amount of charge from a feedback signal and couples that first amount of charge to the first and second inputs of the integrator. Second switched capacitor circuitry 711, 714, 716, 717 selectively samples a second amount of charge from the feedback signal and couples that second amount of charge to the first and second inputs of the integrator stage to selectively compensate for an offset of an input signal to the integrator with respect to a reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.