Low jitter trigger circuit for electro-optic probing apparatus

Abstract

A trigger circuit is composed of a frequency multiplying portion which receives an electric signal to be measured and multiplies its repetitive frequency so as to output a multiple signal, a comparing portion which receives this multiple signal and outputs a square wave signal corresponding to its value, and a dividing portion which divides the square wave signal so as to output a trigger signal. Accordingly, even when a noise component is superposed on the electric signal to be measured, a trigger signal having little jitter and a repetitive frequency lower than that of the electric signal to be measured is output. Also, the electric field measuring apparatus in accordance with the present invention comprises this trigger circuit and measures, with a highly accurate timing, the electric field of the object to be measured.

Dependencies are inferred from the claim text.