Patent · US Expired

Digital to analog converter which uses main and auxiliary resistor networks

US4396907A · kind A · utility

11Cited by

3References

5Claims

0Family size

Assignee

Siemens Aktiengesellschaft · DE

Inventors

Klaus Wintzer · Munich, DE
Peter Picard · Taufkirchen, DE

Key dates

Filing date	Oct 6, 1981
Grant date	Aug 2, 1983
Priority date	—
Expiry date	Oct 6, 2001

Classification

Technology area (CPC H)Electricity
CPC primaryH03M1/785
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A digital-analog converter functioning according to the .mu.-law wherein a sequence control receives an input digital signal and controls the position of a plurality of switches so as to selectively apply positive or negative voltages to a main resistor network and an auxiliary resistor network and further controls the plurality of switches in such networks for either grounding or connecting to an operational amplifier the outputs of said main and auxiliary resistor networks so as to produce an analog output signal. The invention is useful in time division multiplex telephone systems with digital subscriber stations, for example.

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