Measurement of evoked neural response
First Claim
Patent Images
1. An evoked neural response measuring device comprising:
- a first implantable subsystem comprising an amplifier having a reference voltage input and a signal input, and an electrode array configured to provide stimulation to the auditory nerve and further configured to generate a response signal corresponding to an evoked neural response of the auditory nerve to the stimulation;
wherein said first implantable subsystem is configured to sample the response signal at a first time to obtain a first sampled value of the response signal, and to provide the first sampled value of the response signal to the reference voltage input, and wherein the amplifier is configured to amplify differences between the response signal and the first sampled value of the response signal at a plurality of times to thereby obtain a changing first output signal representing at least a first portion of an amplified version of the evoked neural response of the auditory nerve.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and device for measuring an evoked neural response comprising a sensor (25) for obtaining a sensed signal representing the evoked neural response, a high gain amplifier (30) having a signal input (31) for receiving the sensed signal and having a reference input (32), and means for altering or setting a reference voltage at the reference input (32) to prevent the amplifier (30) saturating with variations of the sensed signal.
-
Citations
18 Claims
-
1. An evoked neural response measuring device comprising:
-
a first implantable subsystem comprising an amplifier having a reference voltage input and a signal input, and an electrode array configured to provide stimulation to the auditory nerve and further configured to generate a response signal corresponding to an evoked neural response of the auditory nerve to the stimulation; wherein said first implantable subsystem is configured to sample the response signal at a first time to obtain a first sampled value of the response signal, and to provide the first sampled value of the response signal to the reference voltage input, and wherein the amplifier is configured to amplify differences between the response signal and the first sampled value of the response signal at a plurality of times to thereby obtain a changing first output signal representing at least a first portion of an amplified version of the evoked neural response of the auditory nerve. - View Dependent Claims (2, 3, 4, 5, 18)
-
-
6. A method of measuring an evoked neural response using a cochlear implant comprising:
-
stimulating a portion of an auditory nerve to elicit an evoked neural response via an electrode array of an implanted subsystem comprising an amplifier having a reference voltage input and a signal input; sensing a response signal corresponding to the evoked neural response using at least the electrode array; sampling the response signal at a first time to obtain a first sampled value of the response signal; providing the first sampled value of the response signal to the reference voltage input; providing the response signal to the signal input; and amplifying differences between the response signal and the first sampled value of the response signal at a plurality of times to thereby obtain a changing first output signal representing at least a first portion of an amplified version of the evoked neural response. - View Dependent Claims (7, 8, 9, 10, 11)
-
-
12. A device for measuring an evoked neural response in a cochlear implant comprising:
-
means for stimulating a portion of an auditory nerve via an electrode array to elicit an evoked neural response via an implanted subsystem comprising an amplifier having a reference voltage input and a signal input; means for sensing a response signal corresponding to the evoked neural response using at least the electrode array; means for sampling the response signal to obtain a first sampled value of the response signal; means for providing the first sampled value of the response signal to the reference voltage input; means for providing the response signal to the signal input; and means for amplifying differences between the response signal and the first sampled value of the response signal at a plurality of times to thereby obtain a changing first output signal representing at least a first portion of an amplified version of the evoked neural response. - View Dependent Claims (13, 14, 15, 16, 17)
-
Specification