Electric field rejection of a dual coil telemetry system
AssigneeMedtronic, Inc.
InventorDavid J. Peichel
Life of this patent
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Abstract
An example telemetry system includes telemetry circuitry configured to communicate with a first device and being located on a circuit board. The telemetry system includes a first bobbin, the first bobbin being located on a first side of the circuit board. The telemetry system includes a first coil, the first coil being wound on the first bobbin in a first direction. The telemetry system includes a second bobbin, the second bobbin being located on a second side of the circuit board. The telemetry system includes a second coil, the second coil being wound on a second bobbin in a second direction, the second direction being opposite the first direction. An outer loop of the first coil and an outer loop of the second coil are electrically coupled together.
Claims19
A telemetry system for communicating with an implantable medical device, the telemetry system comprising:
- telemetry circuitry configured to wirelessly communicate with the implantable medical device and being located on a circuit board;
- a first bobbin, the first bobbin being located on a first side of the circuit board;
- a first coil, the first coil being wound on the first bobbin in a first direction;
- a second bobbin, the second bobbin being located on a second side of the circuit board;
- and
- a second coil, the second coil being wound on the second bobbin in a second direction, the second direction being opposite to the first direction;
- wherein an outer loop of the first coil and an outer loop of the second coil are electrically coupled together;
- and
- a switch configured to be open when a telemetry system receiver is not in use and to be closed when the telemetry system receiver is in use, wherein a first portion of the switch is electrically coupled to the outer loop of the first coil and the outer loop of the second coil, and a second portion of the switch is electrically coupled to ground.
A method comprising:
- placing telemetry circuitry on a circuit board, the telemetry circuitry being configured to wirelessly communicate with an implantable medical device;
- winding a first coil on a first bobbin in a first direction;
- winding a second coil on a second bobbin in a second direction, the second direction being opposite to the first direction;
- placing the circuit board between the first bobbin and the second bobbin such that the first bobbin is located on a first side of the circuit board and the second bobbin is located on a second side of the circuit board;
- and
- electrically coupling an outer loop of the first coil to an outer loop of the second coil;
- and
- a switch configured to be open when a telemetry system receiver is not in use and to be closed when the telemetry system receiver is in use, wherein a first portion of the switch is electrically coupled to the outer loop of the first coil and the outer loop of the second coil, and a second portion of the switch is electrically coupled to ground.
A telemetry system for communicating with an implantable medical device, the telemetry system comprising:
- telemetry circuitry configured to wirelessly communicate with a first the implantable medical device and being located on a circuit board;
- at least one bobbin, the at least one bobbin being located on a first side of the circuit board;
- a first coil, the first coil being wound on the at least one bobbin in a first direction;
- a second coil, the second coil being wound on the at least one bobbin in a second direction, the second direction being opposite to the first direction, wherein an outer loop of the first coil and an outer loop of the second coil are electrically coupled together;
- and
- a switch configured to be open when a telemetry system receiver is not in use and to be closed when the telemetry system receiver is in use, wherein a first portion of the switch is electrically coupled to the outer loop of the first coil and the outer loop of the second coil, and a second portion of the switch is electrically coupled to ground.
Dependencies are inferred from the claim text.