VERFAHREN UND VORRICHTUNG ZUR MESSUNG DER DÄMPFUNG EINES LC-SCHWINGUNGSKREISES

A known oscillator with a 2-terminal coil without a tapping has only a limited dynamic controllability and apart from this is unsuitable for implementation in CMOS technology. The oscillator, first of all is extended by a current mirror. By the addition of the current mirror Q3, Q4 and additional po...

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Bibliographic Details
Main Authors GUGGENBUEHL, WALTER, BRAENDLE, DANIEL, HUG, BENJAMIN
Format Patent
LanguageGerman
Published 15.05.2010
Subjects
BASIC ELECTRONIC CIRCUITRY
ELECTRICITY
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
PULSE TECHNIQUE
TESTING
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Summary:A known oscillator with a 2-terminal coil without a tapping has only a limited dynamic controllability and apart from this is unsuitable for implementation in CMOS technology. The oscillator, first of all is extended by a current mirror. By the addition of the current mirror Q3, Q4 and additional power supply sources, one achieves a greater dynamic controllability and the suitability for implementing it in CMOS technology. By means of the excitation of the oscillating circuit with switched current sources Io, one achieves the proportionality of the oscillation amplitude to Rp and Io. In practice more complicated structures are used for switches and current sources. With this, an additional controllability of the oscillation amplitude independent of the damping of the oscillating circuit is obtained. The method is-used for distance measurement. The additional control of the oscillation amplitude is utilized for the correction of the manufacturing tolerances and of the temperature-dependence.
Bibliography:Application Number: AT19990973365T