Terminator circuit, test apparatus, test head, and communication device

A test apparatus for testing a device under test, the test apparatus comprising:

• a comparator that compares an input signal input by the device under test with a predetermined threshold voltage;
• and
• a terminator circuit that reduces an overshoot of a potential at an input end of the comparator, wherein
• the terminator circuit includes:
• a potential variation detecting section that detects a variation in the potential at the input end of the comparator to which the input signal is supplied;
• and
• a first current generating section that reduces the overshoot at the input end of the comparator which is caused by the application of the input signal, by pulling a current from the input end of the comparator, when the potential variation detecting section detects a rise in the potential at the input end of the comparator, wherein
• the first current generating section pulls the current from the input end by increasing current leakage to a ground point,
• the first current generating section is provided between the input end and the ground point, and
• the first current generating section is provided parallel to a second current generating section.

A test head for supplying an input signal input by a device under test to a comparator that compares the input signal with a predetermined threshold voltage, the test head comprising:

• a potential variation detecting section that detects a variation in a potential at an input end of the comparator to which the input signal is supplied;
• and
• a first current generating section that reduces an overshoot at the input end of the comparator which is caused by the application of the input signal, by pulling a current from the input end of the comparator, when the potential variation detecting section detects a rise in the potential at the input end of the comparator, wherein
• the first current generating section pulls the current from the input end of the comparator by increasing current leakage to a ground point,
• the first current generating section is provided between the end point and the ground point, and
• the first current generating section is provided parallel to a second current generating section.

A communication device comprising:

• a potential variation detecting section that detects a variation in a potential at an end point to which an input signal is supplied;
• and
• a first current generating section that reduces an overshoot at the end point which is caused by the application of the input signal, by pulling a current from the end point, when the potential variation detecting section detects a rise in the potential at the end point, wherein
• the first current generating section pulls the current from the end point by increasing current leakage to a ground point,
• the first current generating section is provided between the end point and the ground point, and
• the first current generating section is provided parallel to a second current generating section.