Communications: electrical – Continuously variable indicating – With supply voltage regulation or compensation
Patent
1982-05-10
1984-06-05
Groody, James J.
Communications: electrical
Continuously variable indicating
With supply voltage regulation or compensation
128419PT, 128903, 34087001, 34087007, 340573, 455127, G08C 1900, A61N 100
Patent
active
044531621
ABSTRACT:
A transmitter for a medical prosthesis which is highly efficient, and also permits rapid starting and stopping so that the same coil can be used for both transmission and reception without undue delays between the two modes of operation. During transmission, a tuned circuit, consisting of the coil and a capacitor, is pumped at a frequency equal to the resonant frequency. Transmission is concluded when almost all of the energy in the tuned circuit is in the form of a voltage across the capacitor and when the current through the inductor is approximately zero. This allows the inductor to be used immediately for reception. At the start of the next transmission cycle, the voltage which is maintained across the capacitor is used to initially energize the tuned circuit.
REFERENCES:
patent: 3949388 (1976-04-01), Fuller
patent: 4236523 (1980-12-01), Gruenenwald
patent: 4281664 (1981-08-01), Duggan
Daly Christopher N.
Money David K.
Groody James J.
Telectronics Pty. Ltd.
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