Frequency selective charge amplifier to attenuate common mode interferers
US10691255B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 23, 2019 |
| Grant date | Jun 23, 2020 |
| Priority date | — |
| Expiry date | Jan 26, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03F2203/45544
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Frequency selective analog front-end circuitry, used to convert a sensed charge signal to an analog voltage is disclosed. In one aspect, the frequency selective analog front-end circuitry includes an op-amp having an output, an inverting input and a noninverting input, a first resistor connected between the terminal of the first capacitor and the inverting input of the op-amp, a second capacitor connected between the output of the op-amp and the inverting input of the op-amp, a second resistor connected between the output of the op-amp and the inverting input of the op-amp, a third capacitor connected between the terminal of the first capacitor and the noninverting input of the op-amp, and a third resistor connected between the noninverting input of the op-amp and a reference voltage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.