Patent · US Expired

Circuit layout for signal amplification

US4746874A · kind A · utility

1Cited by

5References

5Claims

0Family size

Assignees

Licentia Patent-Verwaltungs-GmbH · DE
Telefunken Electronic GmbH · DE

Inventors

Gerhard Forster · Ulm, DE
Konrad Hirsch · Blaustein, DE

Key dates

Filing date	Oct 7, 1986
Grant date	May 24, 1988
Priority date	—
Expiry date	Oct 7, 2006

Classification

Technology area (CPC H)Electricity
CPC primaryH03G3/345
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

In a circuit layout for signal amplification with the aid of a differential amplifier and signal coupling via a first capacitor, it is proposed, in order to prevent unacceptable operating point displacements into the non-linear area of the amplifier layout in the event of temporarily interfering high-level signals, that one input of the differential amplifier connected to the signal source via the first capacitor be connected via a first resistor, and the other input via a second resistor, jointly via an electronic switch controllable by a comparator, to reference potential. A reference voltage source is connected to one input of the comparator, and the signal source to the other input of the comparator via an RC element, whose time constant is of the same order of magnitude as the time constant formed by the first capacitor and the first resistor.

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