Method for performing ADC phase-frequency response test
US10090849B1 · kind B1 · utility
Inventors
Key dates
| Filing date | Jan 11, 2018 |
| Grant date | Oct 2, 2018 |
| Priority date | — |
| Expiry date | Jan 11, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1009
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The present disclosure discloses a method for performing an ADC phase-frequency response test including: measuring a time delay of an analog mixer and low-pass filter (MLPF) in down-converting a specific carrier frequency narrowband frequency modulation (FM) signal; determining an effective sampling frequency required by an ADC for acquiring FM signals; acquiring a high carrier frequency FM signal and a low carrier frequency FM signal before and after down-conversion is performed by the analog MLPF; and demodulating the FM signals that are acquired, correcting an initial phase of a modulation signal of the high carrier frequency FM signal and an initial phase of a modulation signal of the low carrier frequency FM signal, and calculating a phase-frequency response of the ADC at a high carrier frequency. The present disclosure has advantages of a simple test process, a wide frequency range with frequencies and a test simultaneously performed on multiple channels.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.