Carrier concentration controlled surface acoustic wave resonator

Details Carrier concentration controlled surface acoustic wave resonator Carrier concentration controlled surface acoustic wave resonator

1980-10-23

1982-10-12

Grimm, Siegfried H.

Oscillators

Solid state active element oscillator

Significant distributed parameter resonator

310313D, 310366, 333152, 333195, H01L 4104, H03B 532, H03H 925, H03H 942

Patent

active

043541666

ABSTRACT:
A surface acoustic wave resonator formed on a semiconductive piezoelectric substrate (9) has arrays (10, 11) of reflector elements forming rectifying junctions with the substrate, a voltage is impressed between the arrays and related ohmic ground contacts (12, 13) for controlling the carrier concentration beneath the arrays so as to vary the acoustic velocity therebeneath, thereby to tune the resonator. The resonator may include two acoustoelectric transducers (16, 17) for connection with an amplifier in an oscillator loop, or may have but a single acoustoelectric transducer (20) for interconnection between the elements of an oscillator circuit (21).

REFERENCES:
patent: 4166258 (1979-08-01), Tseng
patent: 4233573 (1980-11-01), Grudkowski
patent: 4249146 (1981-02-01), Yen et al.
patent: 4306456 (1981-12-01), Maerfeld

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