Dynamic incremental-SAR analog-to-digital conversion
AssigneeThe Regents of the University of California
InventorsJun Wang, Gert Cauwenberghs
Life of this patent
Estimating the term…
Abstract
A system and a method for recording neural signals. A neural interface system-on-chip for recoding the signals includes one or more electrodes integrated on a complimentary metal-oxide-semiconductor integrated circuit and coupled to one or more corresponding analog front end components. The analog front end components are configured to be programmable for recording one or more neural signals and to operate in at least one of the following selectable programmable modes: a voltage clamp mode and a current clamp mode. The neural interface system-on-chip also includes one or more analog to digital converter components that are coupled to the electrodes.
Claims17
A system, comprising:
- one or more electrodes integrated on a complimentary metal-oxide-semiconductor integrated circuit and coupled to one or more corresponding analog front end components, the one or more analog front end components are configured to be programmable for recording one or more neural signals and to operate in at least one of the following selectable programmable modes:
- a voltage clamp mode and a current clamp mode;
- and
- one or more analog to digital converter components coupled to the one or more electrodes, wherein at least one of the one or more analog to digital converter components comprises a sampling component, a counter component, and an index component, and wherein the one or more analog to digital converter components is configured to operate in an incremental successive approximation register mode in which, for each sampling of an input signal, the counter component is configured to change a counter value to a value corresponding to a preceding sampling of the input signal and the index component is configured to dynamically vary an index value based on a proximity of consecutive samplings until a least significant bit index value is determined;
- the one or more electrodes, the one or more analog front end components, and the one or more analog to digital converter components forming a neural interface system-on-chip for recording of the one or more neural signals.
A method, comprising:
- providing a neural interface system-on-chip including
- one or more electrodes integrated on a complimentary metal-oxide-semiconductor integrated circuit and coupled to one or more corresponding analog front end components, the one or more analog front end components are configured to be programmable for recording one or more neural signals and to operate in at least one of the following selectable programmable modes:
- a voltage clamp mode and a current clamp mode;
- and
- one or more analog to digital converter components coupled to the one or more electrodes, wherein at least one of the one or more analog to digital converter components including a sampling component, a counter component, and an index component, and wherein the one or more analog to digital converter components is configured to operate in an incremental successive approximation register mode in which, for each sampling of an input signal, the counter component is configured to change a counter value to a value corresponding to a preceding sampling of the input signal and the index component is configured to dynamically vary an index value based on a proximity of consecutive samplings until a least significant bit index value is determined;
- the one or more electrodes, the one or more analog front end components, and the one or more analog to digital converter components forming a neural interface system-on-chip for recording of the one or more neural signals;
- and
- recording, using the neural interface system-on-chip, one or more neural signals.
Dependencies are inferred from the claim text.