Apparatus and method for tracking and cancelling DC offset to acquire small AC signal
US10568530B2 · kind B2 · utility
1Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 27, 2015 |
| Grant date | Feb 25, 2020 |
| Priority date | — |
| Expiry date | Mar 5, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C27/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Described is an apparatus which comprises: a source to generate a first current having AC and DC components; a current-to-voltage converter to convert the first current or a copy of the first current to a first voltage proportional to a resistance, the first voltage having AC and DC components that correspond to the AC and DC components of the first current; a sample-and-hold circuit to filter the AC component from the first voltage and for providing an output voltage with the DC component; and an amplifier to receive the output voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.