US Patent 6947070 Video scope utilized in electronic endoscope system

A video scope has an image sensor, a circuit board, and a digital signal processor mounted on the circuit board. The digital signal processor reads image signals from the image sensor, and processes the read image signals to thereby produce at least two types of video signal. A wiring-pattern is formed on the circuit board to feed a video signal component, included in one of the two types of video signals, from the digital signal processor. The wiring-pattern is cut off at a suitable location. When the wiring-pattern remains as an unused wiring-pattern on the circuit board, the wiring-pattern is treated such that radiation of noise is prevented from going through the unused wiring-pattern.