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Microcontroller-based temperature compensation scheme for two-port SAW oscillators

Title data

Roith, Bernd ; Gollwitzer, Andreas ; Lerner, Andreas ; Fischerauer, Gerhard:
Microcontroller-based temperature compensation scheme for two-port SAW oscillators.
In: Proceedings of the 2006 IEEE International Frequency Control Symposium and Exposition ; Miami, Florida, 4-7 June, 2006. - Piscataway, NJ : IEEE , 2006 . - pp. 827-830
ISBN 1-4244-0073-2
DOI: https://doi.org/10.1109/FREQ.2006.275496

Abstract in another language

We present a surface acoustic wave (SAW) two-port oscillator extended by a feedforward control circuit, the goal of which is to suppress the effects of the SAW resonator temperature characteristics on the oscillator output frequency. The control circuit consists of a temperature sensor near the SAW resonator the output signal of which is fed to the analog-to-digital converter (ADC) input of a microcontroller. An algorithm implemented on the microcontroller combines the information on the actual temperature and the temperature behavior of all oscillator components (known from previous measurement campaigns) to determine a compensation signal. The latter is fed to a phase shifter inserted in the oscillator feedback loop such that any temperature-induced changes in the round-trip phase shift of the oscillator loop are counteracted. An improvement factor in the frequency stability of 4.4 was demonstrated in the temperature range from 0 to 60 °C and can be further improved to a value of at least 10.

Further data

Item Type: Article in a book
Refereed: No
Institutions of the University: Faculties
Faculties > Faculty of Engineering Science
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology
Faculties > Faculty of Engineering Science > Chair Measurement and Control Technology > Chair Measurement and Control Technology - Univ.-Prof. Dr.-Ing. Gerhard Fischerauer
Result of work at the UBT: Yes
DDC Subjects: 600 Technology, medicine, applied sciences > 620 Engineering
Date Deposited: 17 Nov 2021 10:52
Last Modified: 17 Nov 2021 10:52
URI: https://eref.uni-bayreuth.de/id/eprint/67861