Input circuitry for an analog-to-digital converter, receiver, base station and method for operating an input circuitry for an analog-to-digital converter
US11489536B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2021 |
| Grant date | Nov 1, 2022 |
| Priority date | — |
| Expiry date | Jun 25, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B1/48
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
Input circuitry for an analog-to-digital converter (ADC) is provided. The input circuitry includes a calibration signal source configured to output a calibration signal for the ADC and an analog circuitry configured to receive and process an analog input signal for the ADC. The analog circuitry is further configured to generate a combined signal by combining the analog input signal and the calibration signal. The input circuitry further includes a buffer amplifier coupled to the analog circuitry and configured to supply a buffered signal to the ADC based on the combined signal. Further, the input circuitry includes neutralization circuitry configured to generate, based on the calibration signal, a neutralization signal for mitigating an unwanted signal component related to a limited reverse isolation of the analog circuitry. The neutralization circuitry is further configured to supply the neutralization signal to at least one of an input node and an intermediate node of the analog circuitry.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.