Patent · US Expired

Integratable filter circuit

US5039890A · kind A · utility

1Cited by

7References

6Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Hartmut Jasberg · Ottobrunn, DE
Ulrich Lachmann · Munich, DE

Key dates

Filing date	Oct 12, 1989
Grant date	Aug 13, 1991
Priority date	—
Expiry date	Oct 12, 2009

Classification

Technology area (CPC H)Electricity
CPC primaryH03H11/34
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A filter circuit suitable for integration has first and second voltage/current converters. A signal source is coupled to the first voltage/current converter. A capacitor is coupled to the second voltage/current converter. An amplifier is coupled to the capacitor and has an output forming a filter output. The voltage/current converters have outputs fed to the capacitor in phase opposition to one another.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.