Transceiver for an implantable medical device having switchable series-to-parallel tank circuit
First Claim
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1. A transceiver circuit useful in an inductive coupling wireless communication system device, comprising:
- a resonant circuit comprising an inductor and a capacitor;
a transmitter for driving the resonant circuit to produce a transmitted field during a transmit mode;
a receiver for detecting a received field using the resonant circuit during a receive mode; and
a voltage divider connected to the resonant circuit for providing a divided voltage from the resonant circuit to an input of the receiver during the transmit mode,wherein the inductor and capacitor are coupled in series during the transmit mode,wherein the inductor and capacitor are coupled in parallel during the receive mode, andwherein the voltage divider is inoperable during the receive mode.
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Abstract
An improved transceiver circuit particularly useful in an inductively coupled wireless communication system such as an implantable medical device system is disclosed. The improved transceiver circuit is switchable to assume a serial L-C configuration in the transmit mode and a parallel L-C configuration in the receive mode, but does not require high voltage switches. A low-drive transmitter and a high-input-impedance receiver are used, which reduces power consumption in receive mode, while still maintaining good transmitter performance.
77 Citations
27 Claims
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1. A transceiver circuit useful in an inductive coupling wireless communication system device, comprising:
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a resonant circuit comprising an inductor and a capacitor; a transmitter for driving the resonant circuit to produce a transmitted field during a transmit mode; a receiver for detecting a received field using the resonant circuit during a receive mode; and a voltage divider connected to the resonant circuit for providing a divided voltage from the resonant circuit to an input of the receiver during the transmit mode, wherein the inductor and capacitor are coupled in series during the transmit mode, wherein the inductor and capacitor are coupled in parallel during the receive mode, and wherein the voltage divider is inoperable during the receive mode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A transceiver circuit useful in an inductive coupling wireless communication system device, comprising:
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a resonant circuit comprising an inductor and a capacitor; a transmitter for driving the resonant circuit to produce a transmitted field during a transmit mode; a receiver for detecting a received field using the resonant circuit during a receive mode; at least one switch for connecting the inductor and capacitor in series during the transmit mode and for connecting the inductor and capacitor in parallel during the receive mode; and a voltage divider connected to the resonant circuit for providing a divided voltage from the resonant circuit to an input of the receiver during the transmit mode, wherein the voltage divider is inoperable during the receive mode. - View Dependent Claims (13, 14, 15, 16)
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17. A transceiver circuit useful in an inductive coupling wireless communication system, comprising:
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a resonant circuit comprising an inductor and a capacitor; a transmitter powered by a power supply voltage for driving the resonant circuit to produce a transmitted field during a transmit mode; a receiver powered by the power supply voltage for detecting a received field using the resonant circuit during a receive mode; at least one switch for connecting the inductor and capacitor in series during the transmit mode; at least one switch for providing a divided voltage from the resonant circuit to an input of the receiver during the transmit mode; and at least one switch for connecting the inductor and capacitor in parallel during the receive mode, wherein the divided voltage provided from the resonant circuit to an input of the receiver during the transmit mode is not provided during the receive mode. - View Dependent Claims (18)
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19. An implantable medical device, comprising:
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a battery; a resonant circuit comprising an inductor and a capacitor; a transmitter powered by the battery for driving the resonant circuit to produce a transmitted field during a transmit mode; a receiver powered by the battery for detecting a received field using the resonant circuit during a receive mode; and a voltage divider connected to the resonant circuit for providing a divided voltage from the resonant circuit to an input of the receiver during the transmit mode, wherein the inductor and capacitor are coupled in series during the transmit mode, and wherein the inductor and capacitor are coupled in parallel during the receive mode, and wherein the voltage divider is inoperable during the receive mode. - View Dependent Claims (20, 21, 22, 23, 24)
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25. An implantable medical device, comprising:
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a battery; a resonant circuit comprising an inductor and a capacitor; a transmitter powered by the battery for driving the resonant circuit to produce a transmitted field during a transmit mode; a receiver powered by the battery for detecting a received field using the resonant circuit during a receive mode; at least one switch for connecting the inductor and capacitor in series during the transmit mode and for connecting the inductor and capacitor in parallel during the receive mode; and a voltage divider connected to the resonant circuit for providing a divided voltage from the resonant circuit to an input of the receiver during the transmit mode, wherein the voltage divider is inoperable during the receive mode. - View Dependent Claims (26, 27)
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Specification