Patent · US Expired

Speed-dependent signal generator

US4532437A · kind A · utility

8Cited by

2References

3Claims

0Family size

Assignee

Robert Bosch GmbH · DE

Inventors

Bernd Bodig · Leinfelden, DE
Hermann Kull · Stuttgart, DE
Richard Schleupen · Großingersheim, DE

Key dates

Filing date	Feb 16, 1983
Grant date	Jul 30, 1985
Priority date	—
Expiry date	Feb 16, 2003

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02T10/40
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

Abstract

An operational amplifier is used as a threshold switch and an inductive generator that provides a wave used for timing operation of the threshold switch also feeds a circuit that produces a reference current corresponding to the average absolute magnitude of the generator voltage, which, in turn, is fed to at least one current mirror, the output of which is used to shift the operating threshold of the operational amplifier. A second current mirror is used in alternation with the first for half-waves of the generator voltage which are of opposite polarity and a positive feedback connection around the operational amplifier provides a switching characteristic having an appropriate amount of hysteresis so that the inherent timing shift is compensated on switching in response to both positive-going and negative-going portions of the generator output wave.

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