Extended common mode input range for a delta-sigma converter
US6172630A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 18, 1998 |
| Grant date | Jan 9, 2001 |
| Priority date | — |
| Expiry date | Aug 18, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/454
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A delta-sigma modulator includes an integrator which includes an integrating amplifier having an input terminal and an output terminal. A pole of a first single-pole-double-throw (SPDT) switch is coupled to a first electrode of an input capacitor, while a first throw of the first SPDT switch is coupled to an input signal source, and a second throw is coupled to a source of reference potential (ground). A pole of a second SPDT switch is coupled to a second electrode of the capacitor, while a first throw of the second SPDT switch is coupled to the input terminal of the integrating amplifier. A feedback signal generator has an input terminal coupled to the output terminal of the integrating amplifier, and an output terminal directly coupled to a second throw of the second SPDT switch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.