Patent ID: 8421474
Filing Date: 2013-04-16
Classification: G01R

Abstract:
1. A circuit test apparatus for testing a device under test (DUT), wherein the DUT comprises a first terminal end and a second terminal end to produce a first output signal and a second output signal, respectively, and the circuit test apparatus determines whether the DUT has passed the test according to the first and second output signals, comprising: a precision measure unit (PMU) connected to the DUT, wherein the PMU transmits a DC mode test signal to the DUT and receives a result signal corresponding to the test signal; a processing module, connected to the first and second terminal ends of the DUT, wherein the processing module comprises a differential amplifier circuit amplifying the difference between the first and second output signals and accordingly generating a single-ended AC mode processing signal; a computing module, connected to the processing module and the PMU, wherein the computing module comprises an RMS to DC converter converting the single-ended AC mode processing signal into the DC mode result signal, wherein the computing module transmits the DC mode result signal through its output end to the PMU; and a micro processor, connected to the PMU and determining whether the DUT has passed the test according to the result signal.