Title :
Non-linear modeling and performance of oscillators using thin-film bulk-acoustic wave devices
Author :
Burns, S.G. ; Thompson, P.H. ; Kline, G.R.
Author_Institution :
Microelectron. Res. Center, Iowa State Univ., Ames, IA, USA
Abstract :
Thin-film bulk-acoustic-wave resonators (TFR) and TFR-based filters have been used in single-line-spectra UHF and L-band oscillators in both hybrid and monolithic integrated versions. Two methods are proposed for modeling the behavior of the amplifier in a SPICE simulation. The first uses a nonlinear controlled generator derived from measured gain compression data. The second involves a circuit model of the amplifier used in a closed-loop simulation. The method of deriving the amplifier models is presented along with experimental results for the actual oscillator circuits. The oscillators, using commercial hybrid Darlington amplifiers as the gain element, are evaluated with fundamental mode frequencies in the area of 1 GHz
Keywords :
acoustic microwave devices; acoustic resonators; circuit analysis computing; crystal filters; digital simulation; equivalent circuits; hybrid integrated circuits; microwave oscillators; monolithic integrated circuits; nonlinear network analysis; solid-state microwave circuits; 1 GHz; L-band oscillators; SPICE simulation; amplifier; circuit model; closed-loop simulation; filters; gain compression data; hybrid Darlington amplifiers; hybrid IC; monolithic IC; nonlinear controlled generator; oscillators; resonators; single-line-spectra UHF; thin-film bulk-acoustic wave devices; Circuit simulation; Filters; Frequency measurement; Gain measurement; Microelectronics; Oscillators; Power generation; SPICE; Thin film devices; Transfer functions;
Conference_Titel :
Frequency Control Symposium, 1988., Proceedings of the 42nd Annual
Conference_Location :
Baltimore, MD
DOI :
10.1109/FREQ.1988.27613
