Lock-in amplifier with selectable phase selectivity

The amplifier has a multiplier for mixing a measurement signal with a reference signal and a devices for non-linear transformation of the measurement signal and reference signal to vary the phase selectivity. At least one transformation device contains a digital signal processor. At least one transf...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	HEEL, HELMUT, -U, WEISS, ARMIN, ZUERL, KONRAD
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AMPLIFIERS BASIC ELECTRONIC CIRCUITRY DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER DIAGNOSIS ELECTRICITY HUMAN NECESSITIES HYGIENE IDENTIFICATION INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MEASURING MEDICAL OR VETERINARY SCIENCE PHYSICS SURGERY TESTING
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Beschreibung
Zusammenfassung:	The amplifier has a multiplier for mixing a measurement signal with a reference signal and a devices for non-linear transformation of the measurement signal and reference signal to vary the phase selectivity. At least one transformation device contains a digital signal processor. At least one transformation device contains an analogue component with a non-linear characteristic.