Regulated switch driving scheme in switched-capacitor amplifiers with opamp-sharing
US7345530B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 1, 2006 |
| Grant date | Mar 18, 2008 |
| Priority date | — |
| Expiry date | Aug 19, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F3/005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A switched-capacitor amplifier circuit including first and second pairs of sampling capacitors for sampling a pair of input signals includes a voltage regulator coupled to receive a first reference voltage and generate a first regulated output voltage related to the first reference voltage and independent of a first power supply voltage; a clock signal generator generating first and second clock signals referenced to the first power supply voltage and third and fourth clock signals referenced to the first regulated output voltage; and a first set of switches coupling the bottom plates of the sampling capacitors to the amplifier, the first set of switches being controlled by the third and fourth clock signals. The circuit may further include a second set of switches coupling the top plates of the sampling capacitors to the input signals, the second set of switches being controlled by the first and second clock signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.