Wireless transmitter
AssigneeIvy Biomedical Systems, Inc.
InventorMark Tuccillo
Life of this patent
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Abstract
A magnetic field tolerant amplifier having an amplifier stage, a differential to single-ended output amplifier stage and a first and second delay line. In another embodiment the invention relates to a magnetic gradient cancellation delay line including two coils connected in series at a junction and non-inductively wound to cancel induced currents from magnetic gradient. In another embodiment the invention relates to a patient lead including a flexible circuit substrate having a flexible conductor having distributed impedance. In still yet another embodiment the invention relates to a wireless transceiver system including an RF cancellation delay line; a differential amplifier stage; a differential to single ended output amplifier stage; an A/D converter; an RF transceiver and an antenna.
Claims10
A magnetic field tolerant amplifier comprising:
- An amplifier stage, said amplifier stage comprising a pair of differential input terminals and a pair of differential output terminals;
- a differential to single ended output amplifier stage, said differential to single ended output amplifier stage comprising a pair of differential input terminals and an output terminal, each of said differential input terminals of said differential to single ended output amplifier stage in electrical communication with a respective differential output terminal of said amplifier stage;
- and
- a first delay line and a second delay line, each first and second delay line having an output terminal, each said output terminal of said first and second delay line in electrical communication with a respective input terminal of said pair of differential input terminals of said amplifier stage.
A magnetic gradient cancellation delay line comprising:
- two coils connected in series at a junction;
- a capacitor having a first terminal and a second terminal, said first terminal of said capacitor in electrical communication with said junction and said second terminal of said capacitor in electrical communication with ground,
- wherein each of said coils are non-inductively wound to cancel induced currents from a magnetic gradient.
A patient lead comprising:
- a flexible circuit substrate comprising a flexible conductor,
- wherein said flexible conductor has distributed impedance.
A wireless transceiver system comprising:
- a RF cancellation delay line having a pair of output terminals;
- an amplifier stage, said amplifier stage comprising a pair of differential input terminals and a pair of differential output terminals;
- each of said pair of differential input terminals of said amplifier stage in electrical communication with a respective output terminal said pair of RF cancellation delay line output terminals;
- a differential to single ended output amplifier stage, said differential to single ended output amplifier stage comprising a pair of differential input terminals and an output terminal, each of said differential input terminals of said differential to single ended output amplifier stage in electrical communication with a respective one of said differential output terminals of said amplifier stage;
- an A/D converter having an output terminal and having an input terminal, said input terminal of said A/D converter in electrical communication with said output terminal of said differential to single ended output amplifier stage;
- an RF transceiver having an output terminal and having an input terminal, said input terminal of said RF transceiver in electrical communication with said output terminal of said A/D converter;
- an antenna in electrical communication with said output terminal of said RF transceiver.
A wireless transceiver system comprising:
- a first transceiver sub-system comprising:
- an RF cancellation delay line having a pair of output terminals;
- an amplifier stage, said amplifier stage comprising a pair of differential input terminals and a pair of differential output terminals;
- each of said pair of differential input terminals of said amplifier stage in electrical communication with a respective output terminal said pair of RF cancellation delay line output terminals;
- a differential to single ended output amplifier stage, said differential to single ended output amplifier stage comprising a pair of differential input terminals and an output terminal, each of said differential input terminals of said differential to single ended output amplifier stage in electrical communication with a respective one of said differential output terminals of said amplifier stage;
- an A/D converter having an output terminal and having an input terminal, said input terminal of said A/D converter in electrical communication with said output terminal of said differential to single ended output amplifier stage;
- an RF transceiver having an output terminal and having an input terminal, said input terminal of said RF transceiver in electrical communication with said output terminal of said A/D converter;
- an antenna in electrical communication with said output terminal of said RF transceiver;
- and
- a second transceiver subsystem comprising;
- a second RF transceiver having an input terminal and an output terminal;
- and
- an antenna in electrical communication with said input terminal of said second RF transceiver.
A method for transmitting a signal in a magnetic environment, the method comprising the steps of:
- providing said signal to one input terminal of a differential amplifier;
- delaying said signal 180 degrees using a delay line comprising a pair of non-inductively wound coils;
- and
- providing said signal delayed by 180 degrees to a second terminal of said differential amplifier.
Dependencies are inferred from the claim text.