Integration-based low noise amplifiers for sensors
US10892723B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2018 |
| Grant date | Jan 12, 2021 |
| Priority date | — |
| Expiry date | Mar 12, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45444
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A semiconductor amplifier circuit comprising an input block adapted for receiving a voltage signal to be amplified, an integrator circuit having an integrating capacitor providing a continuous-time signal representative for the integral of the voltage signal, a first feedback path comprising: a sample-and-hold block and a first feedback block, the first feedback path providing a proportional feedback signal upstream of the current integrator. The amplification factor is larger than 1 for a predefined frequency range. Charge stored on the integrating capacitor at the beginning of a sample period is linearly removed during one single sampling period in such a way that the absolute value of the charge is smaller at the end of the sampling period than at the beginning of the sample period when the voltage signal to be amplified is equal to zero.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.