Communications: electrical – Audible indication – Percussion-type sound producer
Patent
1977-11-17
1979-02-06
Miller, Charles D.
Communications: electrical
Audible indication
Percussion-type sound producer
340347AD, 340347NT, 307221D, 357 24, H03K 1309
Patent
active
041386663
ABSTRACT:
A charge transfer circuit of the type including first and second capacitors and a charge transfer transistor for transferring discrete packets of charge from the first to the second capacitor is disclosed. The charge transfer circuit includes a feedback circuit which recharges the first capacitor to a value which varies as a function of the threshold voltage of the charge transfer transistor. As a result, the magnitude of the charge packets transferred by the charge transfer remain at a predetermined value irrespective of variations in the threshold voltage of the transistor.
REFERENCES:
patent: 3414807 (1968-12-01), Evans
patent: 3737683 (1973-06-01), Sangster
patent: 3986176 (1976-10-01), Weimer
patent: 4070667 (1978-01-01), Eichelberger
patent: 4074260 (1978-02-01), Butler
Butler Walter J.
Eichelberger Charles W.
Cohen Joseph T.
General Electric Company
Krauss Geoffrey H.
Miller Charles D.
Snyder Marvin
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