Delay device, semiconductor testing device, semiconductor device, and oscilloscope

摘要

To enhance the accuracy of the delay time of the delay device by reducing the change in the power supply voltage for the delay device, and a delay device that delays an incoming transmission signal, comprising: a delay element that operates on a power supply voltage Vdd and a power supply voltage Vss and delays the transmission signal, the voltage Vdd being larger than the voltage Vss; an addition circuit that outputs to an output of the delay element, a predetermined voltage that is larger than the voltage Vss and smaller than the voltage Vdd. This delay element includes a digital circuit that outputs one of output voltages of two possible values in correspondence with an input voltage. Furthermore, the addition circuit outputs a voltage substantially similar to a threshold voltage that said output of the digital circuit inverts from one of the output voltages of two possible values to another thereof.