Title :
Oscillator circuit configuration for quartz-crystal-resonator sensors subject to heavy acoustic load
Author :
Ferrari, V. ; Marioli, D. ; Taroni
Author_Institution :
Dipt. di Electtronica per l´´Autom., Brescia Univ., Italy
fDate :
3/30/2000 12:00:00 AM
Abstract :
An oscillator circuit configuration is presented to track accurately the resonant frequency and to increase the operating range of quartz-crystal-resonator sensors subject to heavy acoustic loading. The circuit is based on a block for the active cancellation of the crystal electrical capacitance, inserted in a phase-locked loop oscillator. Experimental results confirming the successful application of the principle are reported
Keywords :
capacitance; crystal oscillators; crystal resonators; electric sensing devices; equivalent circuits; phase locked loops; PLL oscillator; active cancellation; crystal electrical capacitance; heavy acoustic load; oscillator circuit configuration; phase-locked loop oscillator; quartz-crystal-resonator sensors; resonant frequency tracking;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20000493
