A novel frequency response measurement method for wideband ADCs' system

Abstract

Abstract The parallel analogue to digital converter (ADC) structure with mixers such as digital bandwidth‐interleaving ADC (DBI‐ADC) is a practical structure for realising the wideband data acquisition system. The system calibration relies on accurate system frequency response measurement. However, existing measurement methods require complex synchronous circuits or are susceptible to noise. This paper proposes a new frequency response measurement method, which can be realised by a simple circuit without any synchronisation measures. At the same time, frequency response measurement can ensure sufficient accuracy. Simulation and experiment results show that the method is effective and feasible.

Keywords

• Modulators, demodulators, discriminators and mixers
• A/D and D/A convertors
• A/D and D/A convertors