Device for testing analog-to-digital converter in e.g. audio or video applications, has switching unit supplying analog signal in first operation mode and digital signal in second mode to filter device based on test signal

摘要

The device has a first input (10) supplying an analog signal, and a second input (11) supplying a digital signal. A switching unit (12) supplies the analog signal in a first operation mode and the digital signal in a second mode to a filter device (13) based on a test signal. The filter device is located at an analog-to-digital converter (14) i.e. sigma-delta analog-to-digital converter. The filter device comprises an anti-aliasing filter and two capacitors. A buffer assembly is provided with an amplifier and arranged between the filter device and the analog-to-digital converter. An independent claim is also included for a method for testing analog-to-digital converter in e.g. audio or video applications, and wireless or wire-bound communication.