Electricity: power supply or regulation systems – Remote sensing
Patent
1982-08-19
1985-09-03
Rubinson, Gene Z.
Electricity: power supply or regulation systems
Remote sensing
179107E, 323223, H04R 300
Patent
active
045394415
ABSTRACT:
A hearing-aid has an electronic voltage stabilizing circuit (16) to compensate for change in supply voltage due to battery (18) aging and use. The electret microphone (11) is located within a housing, the voltage stabilizing circuit (16) being located within the same microphone housing, thus requiring no additional space or terminal connections. Preferably, an impedance transformer is provided; the electronic components (31-34) are placed on the same semi-conductor chip as the components (35, 36) of the voltage stabilizing circuit.
REFERENCES:
patent: 3939396 (1976-02-01), Larson
patent: 4068090 (1978-01-01), Komatsu
patent: 4117275 (1978-09-01), Miyanaga
patent: 4268725 (1981-05-01), Nakagawa
patent: 4281222 (1981-07-01), Nakagawa
patent: 4385209 (1983-05-01), Greason
"The ELZ Electret Transmitter," Bell System Tech. Journal, vol. 58, No. 7, Sep. 1979.
Bosch Publication No. 6 DRC.
Eggert Albert
Goldschmidt Rainer
Robert & Bosch GmbH
Rubinson Gene Z.
Schroeder L. C.
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