Integrated active filter without external components
US4808947A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1987 |
| Grant date | Feb 28, 1989 |
| Priority date | — |
| Expiry date | Apr 8, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S257/923
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An integrated circuit selectively programmable to form an active filter without external circuit components, the integrated circuit having 2.sup.m amplifying modules where m is an integer between 2 and 4, inclusive, p resistive matrices where p is 1 when m is other than 4 and is 2 when m=4, and a bias circuit, r of the amplifying modules being positioned in a first column separated from a second column of r amplifying modules by a respective one of the resistive matrices, where r=4 when m is other than 2 and r=2 when m=2, the second column of amplifying modules being separated from a third column of 4 amplifying modules when m=4 by a second of the resistive matrices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.