Sensor readout circuitry, a biopotential signal sensor, a neural probe, and a method for readout of an analog sensor input signal
US12419559B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2022 |
| Grant date | Sep 23, 2025 |
| Priority date | — |
| Expiry date | Jul 25, 2044 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/6868
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A sensor readout circuitry comprises: a delta-sigma modulator; an input stage for receiving an analog sensor input signal, wherein a transconductance amplifier and a current mirror incorporate a flipped voltage follower, wherein a feedback signal from a digital-to-analog converter of the delta-sigma modulator is received such that subtraction between the analog sensor input signal and the feedback signal is performed in the transconductance amplifier and mirrored by the current mirror to an output of the input stage; wherein the transconductance amplifier comprises a first, second and third chopper, whereby a chopping loop between the first, second and third choppers is formed including an input transistor and current sources and whereby the analog sensor input signal is in baseband at a node in which the feedback signal is received.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.