Patent · US Expired

Surface acoustic wave sensor

US6314791A · kind A · utility

23Cited by

5References

7Claims

0Family size

Assignee

Forschungszentrum Karlsruhe GmbH · DE

Inventors

Michael Rapp · Seeheim-Jugenheim, DE
Achim Voigt · Blankenloch, DE

Key dates

Filing date	Feb 23, 2000
Grant date	Nov 13, 2001
Priority date	—
Expiry date	Feb 23, 2020

Classification

Technology area (CPC G)Physics
CPC primaryG01N2291/106
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

In a sensor comprising a housing, through which a medium to be examined is conducted, the housing includes at least two passive building components capable of oscillating and oscillator circuits of which each includes an amplifier component and a variable phase shifting component providing for a phase shift range sufficiently large to switch the oscillating components off while the amplifier component remains operating.

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