JPH0221568U - - Google Patents

Description

[Brief explanation of drawings]

FIG. 1 is a diagram showing an embodiment of the clot's leak noise measuring device according to the present invention, FIG. 2 is a diagram showing the relationship between clot's leak noise and strobe signals in the present invention, and FIG. FIG. 4 is a time chart showing the relationship between clock leak noise and clocks, FIG. 5 is a diagram showing a conventional device, and FIG. 6 is an enlarged view of the clock leak noise section. 1...DUT, 2...Comparator, 3...Oscillator, 4...Reference voltage generator, 5...Controller.

Claims (1)

[Claims for Utility Model Registration] In a device for measuring the magnitude of so-called clock leak noise superimposed on the output waveform of a sample/hold amplifier (hereinafter simply referred to as DUT), a strobe having a cycle different from the cycle of a clock signal applied to the DUT. An oscillator that generates a signal C and applies it to a comparator, which will be described later. A reference voltage generator that outputs a reference voltage of an arbitrary value. The output voltage of the reference voltage generator and the magnitude of the DUT output are determined by the application timing of the strobe signal. A comparator for comparison, a controller for changing a reference voltage output from a reference voltage generator at regular intervals, and a controller for measuring the magnitude of clock leak noise based on the reference voltage value at the time the comparator output changes. Creek noise measuring device.