Title :
SAW coupled resonator oscillator technology
Author :
Robinson, J. Michael
Author_Institution :
RF Monolithics Inc., Dallas, TX, USA
Abstract :
Oscillator design enhancements using a SAW (surface acoustic wave) coupled-resonator filter (CR) are presented. The CR oscillator provides advantages in size, manufacturing, phase noise, and vibration performance. No impedance matching networks are required with a CR to provide the correct conditions for oscillation. A CR has twice the phase slope of standard resonators which provides 6-dB improvement in phase noise, and the bandwidth is controllable, making it an excellent choice for voltage-controlled applications. Two different types of hybrid SAW CR oscillators are examined: a 318-MHz fixed-frequency oscillator using an integrated circuit in a TO-39 package, and a 1-GHz voltage-controlled oscillator with discrete components. The voltage-controlled SAW CR oscillator has a package size of 1.27×0.77×0.25 in and a phase noise floor of -160 dBc at 200 kHz. The CR voltage-controlled SAW oscillator is compared to standard resonator and delay-line oscillators
Keywords :
oscillators; surface acoustic wave devices; ultrasonic devices; 0.25 in; 0.77 in; 1 GHz; 1.27 in; 318 MHz; SAW VCO; SAW coupled resonator filter; TO-39; bandwidth; fixed-frequency oscillator; oscillator design; package size; phase noise; phase noise floor; phase slope; vibration performance; voltage-controlled oscillator; Acoustic waves; Bandwidth; Chromium; Impedance matching; Integrated circuit packaging; Manufacturing; Phase noise; Resonator filters; Surface acoustic waves; Voltage-controlled oscillators;
Conference_Titel :
Ultrasonics Symposium, 1989. Proceedings., IEEE 1989
Conference_Location :
Montreal, Que.
DOI :
10.1109/ULTSYM.1989.66957
