Patent ID: 6087838
Filing Date: 2000-07-11
Classification: G01R

Abstract:
A signal processing circuit for an electro-optic probe, comprising:first ramp generation means for generating a signal which increases in level with a predetermined slope at a timing to receive a trigger pulse from an external;second ramp generation means for generating a step-like signal consisting of steps in one period of the output signal of the first ramp generation means, wherein the second ramp generation means generates the step-like signal by outputting a constant voltage after the timing to receive the trigger pulse and sequentially adding a predetermined voltage to the constant voltage in response to each of timings based on sampling pulses; andcomparison means for forming a pulse signal when the output signal of the first ramp generation means coincides with the step-like signal output from the second ramp generation means, wherein the pulse signal consists of pulses, which are provided as the sampling pulses,whereby laser beams based on the sampling pulses are supplied to the electro-optic probe so that image display is performed based on output of the electro-optic probe.