Oscillators – Solid state active element oscillator – Significant distributed parameter resonator
Patent
1983-05-03
1986-04-08
LaRoche, Eugene R.
Oscillators
Solid state active element oscillator
Significant distributed parameter resonator
331117FE, 331177V, H03B 524
Patent
active
045815925
ABSTRACT:
An oscillator including an active device (38), a surface acoustic wave resonator (40) connected in a feedback relationship to the active device and an impedance matching circuit is disclosed. The impedance matching circuit in one arrangement is an output impedance matching circuit including an inductor (46) connected in the feedback loop to the output of the active device. In another arrangement, the impedance matching network is an input impedance matching network including an inductor (42) connected in the feedback loop to the input of the active device. In another arrangement of the invention, a varactor diode (60) is connected in the feedback loop and is controlled by a reverse voltage which changes the capacitance of the diode, adjusting the frequency of the oscillator.
REFERENCES:
patent: 3855548 (1974-12-01), Nandi et al.
patent: 4011526 (1977-03-01), Kinsman
patent: 4085388 (1978-04-01), Gilden et al.
patent: 4233573 (1980-11-01), Grudkowski
patent: 4249146 (1981-02-01), Yen et al.
Leja, I., "High Efficiency Saw Oscillator Using Dual Gate GaAs FET", IEEE Proceedings-1979 Ultrasonics Symposium (26-28 Sep. '79) pp. 865-869.
LaRoche Eugene R.
Pascal Robert J.
R F Monolithics, Inc.
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