System and Method for Return Electrode Monitoring
First Claim
1. A detection circuit for return electrode monitoring, the detection circuit comprising:
- a transformer operatively coupled to at least one pair of split electrode pads, wherein the transformer is configured to transceive a return electrode sense signal;
at least one first switch coupled to the transformer;
at least one neutrally-referenced second switch, wherein the at least one first switch and the at least one second switch are disposed on a single die; and
an operational amplifier coupled to the at least one first switch and the at least one neutrally-referenced second switch, the operational amplifier being configured to subtract a noise signal from the return electrode sense signal.
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Accused Products
Abstract
A detection circuit for return electrode monitoring is disclosed. The detection circuit includes a transformer operatively coupled to a pair of split electrode pads, wherein the transformer is configured to transceive a return electrode sense signal. The detection circuit also includes a first switch coupled to the transformer and a neutrally-referenced second switch, wherein the first switch and the second switch are disposed on a single die. The detection circuit further includes an operational amplifier coupled to the first switch and the neutrally-referenced second switch. The operational amplifier is configured to subtract a noise signal from the return electrode sense signal.
123 Citations
17 Claims
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1. A detection circuit for return electrode monitoring, the detection circuit comprising:
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a transformer operatively coupled to at least one pair of split electrode pads, wherein the transformer is configured to transceive a return electrode sense signal; at least one first switch coupled to the transformer; at least one neutrally-referenced second switch, wherein the at least one first switch and the at least one second switch are disposed on a single die; and an operational amplifier coupled to the at least one first switch and the at least one neutrally-referenced second switch, the operational amplifier being configured to subtract a noise signal from the return electrode sense signal. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A return electrode monitoring system comprising:
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at least one return electrode pad including at least one pair of split electrode pads; a detection circuit including; a transformer operatively coupled to the at least one pair of split electrode pads, wherein the transformer is configured to transceive a return electrode sense signal; at least one first switch coupled to the transformer; at least one neutrally-referenced second switch, wherein the at least one first switch and the at least one second switch are disposed on a single die and generate substantially similar noise signals; and an operational amplifier coupled to the at least one first switch and the at least one neutrally-referenced second switch, wherein the operational amplifier is configured to cancel out the noise signals from the return electrode sense signal. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A return electrode monitoring system comprising:
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at least one return electrode pad including at least one pair of split electrode pads; a detection circuit including; a single-ended primary transformer operatively coupled to the at least one pair of split electrode pads, wherein the single-ended primary transformer is configured to transceive a return electrode sense signal; a switch package including at least one first switch coupled to the single-ended primary transformer and at least one neutrally-referenced second switch, wherein the at least one first switch and the at least one second switch generate substantially similar noise signals; and an operational amplifier coupled to the switch package, wherein the operational amplifier is configured to cancel out the noise signals from the return electrode sense signal; and a controller coupled to the detection circuit and configured to analyze the noise-cancelled return electrode sense signal. - View Dependent Claims (14, 15, 16, 17)
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Specification