Switched capacitor filter utilizing a differential input and output circuit
US4633425A · kind A · utility
31Cited by
15References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 28, 1985 |
| Grant date | Dec 30, 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 for filtering signals by having cascaded switched capacitor sampling filters. The circuit includes a transmit section which has an anti-aliasing filter, a core section filter, a highpass filter and an encoder for providing analog-to-digital conversion. Each successive filter is sampled at a lower rate to inhibit anti-aliasing. The circuit also includes a receive section which has a digital-to-analog decoder, an output buffer, a receiver core filter and a power amplifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.