Patent ID: 7423444

Claim:
A digital test apparatus, comprising: a signal converting unit electrically coupled to an analog semiconductor device, the signal converting unit for converting an analog signal output from the analog semiconductor device into a direct current voltage and outputting the direct current voltage, wherein the signal converting unit comprises: a low pass filter for passing only a low frequency analog signal from among analog signals output from the analog semiconductor device; a rectifying unit electrically coupled to the low pass filter, the rectifying unit for converting the analog signal output from the low pass filter into a first direct current voltage and outputting the first direct current voltage; a high pass filter for passing only a high frequency analog signal from among the analog signals output from the analog semiconductor device; and a high frequency power detecting unit electrically coupled to the high pass filter, the high frequency power detecting unit for converting the analog signal output from the high pass filter into a second direct current voltage and outputting the second direct current voltage; and a digital measuring unit electrically coupled to the signal converting unit, the digital measuring unit for measuring the direct current voltage output from the signal converting unit and evaluating the analog signal according to the direct current voltage.