A - Human Necessities – 61 – N
Patent
A - Human Necessities
61
N
A61N 1/36 (2006.01) A61N 1/372 (2006.01) A61N 1/378 (2006.01)
Patent
CA 2167342
An apparatus for transcutaneously transmitting a power signal to, and communicating first and second information signals with, an implantable device. The apparatus can include an external unit having first power means for generating the power signal; first signalling means for generating the first information signal; first receiving means for receiving the second information signal; and first coupling means for independently coupling the power signal and said first information signal. The apparatus can also include an internal unit having second power means for receiving the power signal; second signalling means for generating the second information signal; second receiving means for receiving the first information signal; and second coupling means for independently coupling the power signal and the second information signal. The first power means transmits the power signal at a power frequency, and the first signalling means can transmit the first information signal at a frequency greater than the power frequency. The first power means may also include a power supply. The second signalling means, too, may transmit the second information signal at a frequency greater than the power frequency. The external unit can include a power converter for converting a power input signal at a first preselected frequency to a power signal at the power frequency; an external coupler for transmitting the power signal, and for communicating the first and second information signals; an external signal conditioner for symmetrically transceiving the first and second information signals; and an external data controller for symmetrically controlling the first and second information signals. The internal unit can include an internal coupler for receiving the power signal and for communicating the first and second information signals; a voltage regulator for converting the first power signal into said second power signal which is provided to the implantable device; an internal signal conditioner for symmetrically transceiving the first and second information signals; and an internal data controller symmetrically controlling the first and second information signals. Symmetrically controlling includes ASK modulation of a data signal upon an RF carrier signal of a preselected carrier frequency, which is presently preferred to be about 8 megaHertz (MHz). The external and internal couplers each can include a primary and secondary tuned circuit, respectively. Each tuned circuit has a resonant frequency which can be, for example, about 160 kiloHertz (kHz). In addition, the first and second signal conditioners can include a first and second frequency-selective filter, respectively. Each frequency-selective filter can have cutoff frequencies of between about 7.9 MHz and 8.1 MHz, with a central frequency of about 8 MHz.
Cuervo David E.
Prem Edward K.
Macrae & Co.
Vascor Inc.
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