Buffered body return receiver
First Claim
1. A buffered body return receiver, comprising:
- an amplifier connected to a power supply electrically independent from a signal source;
a first electrode directly connected to a non-inverting input of the amplifier; and
a second electrode connected to an inverting input of the amplifier and an output of the amplifier as a driven node, the second electrode appearing as a virtual short with respect to the first electrode.
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Accused Products
Abstract
Buffered body return receiver configurations are described. An amplifier for a receiver can be connected to two electrodes such that one of the two electrodes is connected to a non-inverting input of the amplifier and a second of the two electrodes is a driven node by being connected to both the inverting input of the amplifier and the output of the amplifier. The amplifier may be connected as a fully differential amplifier, a single-ended differential amplifier, a buffer, or an amplifier with a gain greater than 1, while still enabling improved channel gains with reduced power consumption at the transmitter from the signal source. The buffered body return receiver is suitable for scenarios in which a signal source is electrically independent of the power supply of the receiver'"'"'s amplifier.
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Citations
20 Claims
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1. A buffered body return receiver, comprising:
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an amplifier connected to a power supply electrically independent from a signal source; a first electrode directly connected to a non-inverting input of the amplifier; and a second electrode connected to an inverting input of the amplifier and an output of the amplifier as a driven node, the second electrode appearing as a virtual short with respect to the first electrode. - View Dependent Claims (2, 3, 4, 20)
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5. A buffered body return receiver, comprising:
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an amplifier connected to a power supply electrically independent from a signal source; a first electrode directly connected to a non-inverting input of the amplifier; a second electrode connected to an inverting input of the amplifier and directly connected to an output of the amplifier;
a bias impedance connected between the first electrode and a node at a bias voltage;a feedback impedance connected between the output of the amplifier and the inverting input of the amplifier; and a gain impedance connected between the inverting input of the amplifier and the node at the bias voltage.
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6. A physiological signal monitoring system, comprising:
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a power supply electrically independent from a signal source; and a buffered body return receiver comprising an amplifier connected to the power supply;
a first electrode directly connected to a non-inverting input of the amplifier; and
a second electrode connected to an inverting input of the amplifier and an output of the amplifier as a driven node, the second electrode appearing as a virtual short with respect to the first electrode, wherein the first electrode and the second electrode are configured for contact to a body. - View Dependent Claims (7, 8, 9, 10, 12, 13, 14, 15, 16, 17, 18, 19)
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11. A physiological signal monitoring system, comprising:
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a power supply electrically independent from a signal source; a buffered body return receiver comprising an amplifier connected to the power supply; a first electrode directly connected to a non-inverting input of the amplifier; a second electrode connected to an inverting input of the amplifier and directly connected to an output of the amplifier; a bias impedance connected between the first electrode and a node at a bias voltage; a feedback impedance connected between the output of the amplifier and the inverting input of the amplifier; and a gain impedance connected between the inverting input of the amplifier and the node at the bias voltage, wherein the first electrode and the second electrode are configured for contact to a body.
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Specification