Method for amplifier load current cancellation in a current integrator and current integrator with amplifier load current cancellation
US11349439B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 23, 2019 |
| Grant date | May 31, 2022 |
| Priority date | — |
| Expiry date | May 30, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/358
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The amplifier load current cancellation in a current integrator comprises applying an input current to an operational transconductance amplifier provided with an integration capacitor for current integration, leading an output current of the operational transconductance amplifier through a sensing resistor, thus producing a voltage drop over the sensing resistor, generating a cancellation current dependent on the voltage drop over the sensing resistor, and injecting the cancellation current to the output current, before or after the output current passes the sensing resistor, thus eliminating a dependence of the output current on the input current.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.