Amplifiers – With solid element wave propagating amplifying device – Phonon type
Patent
1988-09-16
1990-05-22
Mullins, James B.
Amplifiers
With solid element wave propagating amplifying device
Phonon type
330250, H03F 304
Patent
active
049280694
ABSTRACT:
An amplifying surface wave receiver for a surface wave element composed of a material which exhibits the piezo effect and which can be rendered electrically conductive by local doping, where a doped region is formed at the upper portion of an insulating substrate body (8) which forms the surface wave element and which is composed of piezo electric material, said doped region forms a conductive channel (7) between at least two contact electrodes which are spaced a defined distance from each other, and the conductive channel (7) formed such that occurring piezo charges are positioned so as to modulate the conductivity of said channel. One terminal of a voltage source (4) is connected to one of the contact electrodes (6) and the other terminal is connected to the other contact electrode (6) through an alternating current detector (5).
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patent: 3909741 (1975-09-01), Harris
patent: 4025876 (1977-05-01), Fletcher et al.
Fischler et al., "Amplification of Acoustic Waves in a Coupled Semiconductor-Piezoelectric Ceramic System", Applied Physics Letters, vol. 13, No. 10, Nov. 15, 1968, pp. 351-353.
Meyer, "An Acoustoelectric Transistor", IEEE Transactions on Electron Devices, vol. ED-18, No. 8, Aug. 1971, pp. 597-603.
Hoskins et al., "Monolithic GaAs Acoustic Charge Transport Devices", IEEE 1982 Ultrasonics Symposium, pp. 456-460.
Schink Helmut
Schnell Ralf D.
Mullins James B.
Siemens Aktiengesellschaft
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