Delta-sigma modulator and signal processing system
US8581763B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2011 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Feb 21, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/454
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A ΔΣ modulator includes: a plurality of integrators cascaded to an input of an analog signal; a quantizer for quantizing an output signal of the integrator at a last stage and outputting a resultant digital signal; a DA converter for feedback for converting the digital signal obtained by the quantizer into an analog signal and supplying the analog signal to an input side of at least the integrator at a first stage; and an adder, arranged at an input stage side of the integrator at the last stage, for adding an output of the integrator at a preceding stage of the integrator at the last stage to at least one path signal supplied from at least another path via a first resistor having at least a first coefficient. The integrator at the last stage includes an operational amplifier, an integration capacitor, and a second resistor having a second coefficient.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.