Back to results
US 12,599,329 B2Granted
Sense amplifier for a physiological sensor and/or other sensors
AssigneeInspire Medical Systems, Inc.
InventorsJan Verstreken, Tim Piessens, Heather Orser, David Dieken, John Rondoni, Timothy Denison
Life of this patent
Estimating the term…
Abstract
A device includes a sensor signal input node and a high-pass filter stage. The high-pass filter stage includes an operational amplifier and a feedback integrator. The operational amplifier includes an input node coupled to the sensor signal input node. The feedback integrator is coupled between an output node of the operational amplifier and the input node of the operational amplifier to set a high-pass pole frequency of the high-pass filter stage.
Claims21
A device comprising:
- a sensor signal input node;
- a high-pass filter stage comprising:
- an operational amplifier comprising an input node coupled to the sensor signal input node, and
- a feedback integrator coupled between an output node of the operational amplifier and the input node of the operational amplifier to set a high-pass pole frequency of the high-pass filter stage;
- and
- a multiplexer coupled been the sensor signal input mode and a plurality of electrode nodes, the multiplexer to selectively couple one of the plurality of electrode nodes to the sensor signal input node in response to an electrode selection signal.
3 more elements
A device comprising:
- a sensor signal input nodes;
- a high-pass filter stage comprising:
- an operational amplifier comprising an input coupled to the sensor signal input node, and
- a feedback integrator coupled between an output node of the operational amplifier and the input node of the operational amplifier to set a high-pass pole frequency of the high-pass filter stage;
- a first programmable gain amplifier stage comprising an input node coupled to the output node of the operational amplifier;
- and
- a first bypass switch coupled between the input node of the first programmable gain amplifier stage and an output node of the first programmable gain amplifier stage.
4 more elements
A device comprising:
- a positive sensor signal input node;
- a negative sensor signal input node;
- and
- a high-pass filter stage comprising:
- a fully differential operational amplifier comprising a first input node coupled to the positive sensor signal input node and a second input node coupled to the negative sensor signal input node, and
- a common-mode feedback regulation operational transconductance amplifier (OTA) comprising a first input node coupled to the first input node of the fully differential operational amplifier, a second input node coupled to the second input node of the fully differential operational amplifier, a third input node coupled to a reference voltage node, and an output node coupled to the first input node and the second input node of the fully differential operational amplifier.
3 more elements
A device comprising:
- a high-pass filter amplifier stage comprising common mode rejection and offset correction;
- a first programmable gain amplifier stage coupled to an output of the high-pass filter amplifier stage;
- a first bypass switch coupled in parallel with the first programmable gain amplifier stage;
- a second programmable gain amplifier stage coupled to an output of the first programmable gain amplifier stage;
- a second bypass switch coupled in parallel with the second programmable gain amplifier stage;
- an analog to digital converter coupled to an output of the second programmable gain amplifier stage;
- and
- a physiological sensor coupled to an input of the high-pass filter amplifier stage.
5 more elements
Dependencies are inferred from the claim text.