Patent ID: 7424406
Filing Date: 2008-09-09
Classification: G01R

Abstract:
1. A system for measuring a characteristic of a filter in a DUT employing an analog filter, said system comprising: a digital channel for providing an impulse signal without applying a sine wave to the analog filter of the DUT; a digitizer for receiving an output signal of the analog filter in response to the impulse signal so as to measure the characteristic of the filter; and a controller for controlling the digital channel and the digitizer, wherein the digitizer comprises: an anti-aliasing filter for antialiasing-filtering an output of the analog filter; an analog to digital (A/D) converter for converting a filter output outputted from the anti-aliasing filter into digital data; a memory for capturing the digital data outputted from the A/D converter at a determined storage region; a digital signal processor (DSP) for processing in signal the digital data captured at the memory; and a digital filter for receiving a process signal outputted from the DSP and digitally filtering the process signal.