Sigma-delta modulator with shared operational amplifier and associated method
US8217815B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 24, 2010 |
| Grant date | Jul 10, 2012 |
| Priority date | — |
| Expiry date | Oct 16, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/456
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A Sigma-Delta modulator with a shared operational amplifier (op-amp) includes an integrated circuit, having two integrators sharing the op-amp, capable of integrating two input signals of the two integrators; a plurality of quantizers, coupled to the integrating circuit, for comparing outputting signals of the integrators with a predetermined signal and then generating digital outputting signals; a plurality of DACs, respectively coupled to the quantizers, for converting the digital outputting signals to analog feedback signals to the integrators; and a clock generator, for providing clock signals to the integrating circuit and the quantizers. Accordingly, layout area and power consumption of the modulator are reduced due to the shared op-amp.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.