Voltage overshoot protection

Details Voltage overshoot protection Voltage overshoot protection

2011-08-02

2011-08-02

Pham, Tuan A (Department: 2618)

Telecommunications

Transmitter and receiver at separate stations

Near field

C455S041200, C455S042000, C455S077000, C455S102000, C340S010300, C340S010500, C607S032000, C607S033000, C607S060000

Reexamination Certificate

active

07991355

ABSTRACT:
A transmission circuit for an RF inductive link, particularly for an implanted device such as a cochlear implant. In a preferred form, the transmission circuit1includes a transmitter coil24and a damping device, including an auxiliary coil4and switch6. The switch is operated to close the coil circuit when data zeros are transmitted. This has the advantage of improving modulation depth without placing stress on the RF driver output switches.

REFERENCES:
patent: 6181248 (2001-01-01), Fockens
patent: 7079901 (2006-07-01), Loftin et al.
patent: 2002/0032471 (2002-03-01), Loftin et al.
patent: 2005/0283207 (2005-12-01), Hochmair et al.
First Examiner's Report in Australian Application No. 2004222765 dated Feb. 13, 2009.

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