Switched capacitor filter utilizing a differential input and output circuit and method
US4599573A · kind A · utility
11Cited by
1References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 28, 1985 |
| Grant date | Jul 8, 1986 |
| Priority date | — |
| Expiry date | May 28, 2005 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2200/372
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An integrated circuit employing a differential amplifier and switched capacitor networks to provide filtering techniques. The differential amplifier utilizes a feedback circuit between its inputs and outputs. A switched capacitor network coupled to the inputs of the amplifier and a second switched capacitor network coupled to the outputs of the amplifier provide the requisite filtering necessary for analog-to-digital encoding or digital-to-analog decoding. The differential configuration allows for less noise and better power supply rejection, whereby allowing for a higher signal-to-noise ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.