Patent · US Expired

Controlled current source apparatus for signals of either polarity

US4717869A · kind A · utility

12Cited by

6References

7Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Rudolf Koch · Oberhaching, DE
Eberhard Schmid · Dormitz, DE

Key dates

Filing date	Sep 2, 1986
Grant date	Jan 5, 1988
Priority date	—
Expiry date	Sep 2, 2006

Classification

Technology area (CPC H)Electricity
CPC primaryH03F3/347
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A controlled current source apparatus with a voltage/current converter for deriving a signal current fed to a load, includes a first current source delivering a first d-c current super-imposed on the signal current, and a second current source connected parallel to the load for delivering a second d-c current substracted from the d-c current leading into the load.

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