摘要:
There is provided a test apparatus that is capable of applying, to a device under test, a current that rises within a short period. A test apparatus for testing a device under test, includes a current source that supplies the device under test with a current, a dummy load that has an electrical characteristic corresponding to an electrical characteristic of the device under test, and a switching section that switches whether the current source is connected to the dummy load or the device under test. Here, after connecting the current source to the dummy load, the switching section disconnects the current source from the dummy load and connects the current source to the device under test when a voltage applied to the dummy load reaches a voltage within a predetermined range.
摘要:
A measurement apparatus is provided for measuring at least one of the switching times of the output signals output from a device under test. The measurement apparatus comprises: a first light-emitting unit having a function whereby light emission starts in a case that the voltage of the output signal becomes equal to or greater than a first threshold voltage; a second light-emitting unit having a function whereby light emission starts in a case that the voltage of the output signal becomes equal to or greater than a second threshold voltage that is higher than the first threshold voltage; a first light reception unit which receives light emitted from the first light-emitting unit; a second light reception unit which receives light emitted from the second light-emitting unit; and a measurement unit which measures the switching time required for the voltage to switch between the first threshold voltage and the second threshold voltage, based upon at least one of the difference in the light-emission start timing and the difference in the light-emission stop timing between the first light-emitting unit and the second light-emitting unit.
摘要:
A measurement apparatus is provided for measuring at least one of the switching times of the output signals output from a device under test. The measurement apparatus comprises: a first light-emitting unit having a function whereby light emission starts in a case that the voltage of the output signal becomes equal to or greater than a first threshold voltage; a second light-emitting unit having a function whereby light emission starts in a case that the voltage of the output signal becomes equal to or greater than a second threshold voltage that is higher than the first threshold voltage; a first light reception unit which receives light emitted from the first light-emitting unit; a second light reception unit which receives light emitted from the second light-emitting unit; and a measurement unit which measures the switching time required for the voltage to switch between the first threshold voltage and the second threshold voltage, based upon at least one of the difference in the light-emission start timing and the difference in the light-emission stop timing between the first light-emitting unit and the second light-emitting unit.
摘要:
A test apparatus to test a device under test (DUT) to which a reference voltage of a predetermined high voltage is supplied is provided. The test apparatus includes a reference voltage applying section that applies the reference voltage to the DUT, wherein the reference voltage defines a voltage level that is to be possessed by an output signal output from the DUT when the output signal indicates a predetermined logical value, a voltage level detecting section that detects a voltage level of the reference voltage, a signal comparing section that compares the output signal with an expected value signal, a reference voltage comparing section that judges whether the voltage level of the reference voltage detected by the voltage level detecting section falls within a predetermined expected voltage range, and a judging section that judges whether the DUT is good or bad based on a result of the comparison done by the signal comparing section, under a condition that the voltage level of the reference voltage falls within the expected voltage range.
摘要:
To prevent an excessive current from flowing through a device under test. A test apparatus that tests a device under test, comprising a power supply section that generates a power supply voltage to be supplied to the device under test; an inductive load section that is provided in a path leading from the power supply section to the device under test; a first semiconductor switch that is provided in the path leading from the inductive load section to the device under test and is connected in parallel with the device under test; and a control section that turns the first semiconductor switch ON when supply of the power supply voltage to the device under test is stopped.
摘要:
Provided is a test apparatus that tests a device under test, comprising a plurality of capacitors that are each charged to a predetermined voltage; a switching section that switches which of the capacitors charged to a predetermined voltage supplies power to the device under test; and a judging section that judges acceptability of the device under test based on an operational result of the device under test. Also provided is a test apparatus that selects one of a plurality of capacitors and a corresponding one of a plurality of power supply units, according to content of a test performed after a test that uses another of the capacitors to supply power to the device under test.
摘要:
A signal output device that outputs an output signal according to an input signal expressing a logical value that includes a high-voltage side switching circuit between a first terminal and a second terminal in accordance with a first control signal. The device includes a low-voltage side switching circuit between a first and second terminal for outputting a low-voltage side reference voltage in accordance with a second control signal and a control section. The high-voltage and low-voltage side switching circuits include a plurality of switching devices serially connected between the first terminal and the second terminal and each of which is opened in accordance with a provided control voltage. The control circuit opens the plurality of switching devices substantially in synchronization with each other, where a voltage inputted to the first terminal is outputted from the second terminal by short-circuiting between the first terminal and the second terminal.
摘要:
There is provided a test apparatus that is capable of applying, to a device under test, a current that rises within a short period. A test apparatus for testing a device under test, includes a current source that supplies the device under test with a current, a dummy load that has an electrical characteristic corresponding to an electrical characteristic of the device under test, and a switching section that switches whether the current source is connected to the dummy load or the device under test. Here, after connecting the current source to the dummy load, the switching section disconnects the current source from the dummy load and connects the current source to the device under test when a voltage applied to the dummy load reaches a voltage within a predetermined range.
摘要:
A signal output device that outputs an output signal according to an input signal expressing a logical value that includes a high-voltage side switching circuit between a first terminal and a second terminal in accordance with a first control signal. The device includes a low-voltage side switching circuit between a first and second terminal for outputting a low-voltage side reference voltage in accordance with a second control signal and a control section. The high-voltage and low-voltage side switching circuits include a plurality of switching devices serially connected between the first terminal and the second terminal and each of which is opened in accordance with a provided control voltage. The control circuit opens the plurality of switching devices substantially in synchronization with each other, where a voltage inputted to the first terminal is outputted from the second terminal by short-circuiting between the first terminal and the second terminal.
摘要:
A test apparatus for a device under test (DUT) that includes a signal output device that outputs a signal according to a test signal and a detecting section that detects a signal output from the DUT that outputs a detection result. The signal output device includes an output port, a high-voltage side switching circuit between a first terminal and a second terminal, a low-voltage side switching circuit between a first terminal and a second terminal, and a control section that outputs the first and second control signals. Each of the high-voltage and the low-voltage side switching circuits include a plurality of switching devices serially connected between the first and second terminals. The plurality of switching devices are opened substantially in synchronization with each other, such that a voltage inputted to the first terminal is outputted from the second terminal by short-circuiting between the first and second terminals.