DRIVING CIRCUIT FOR SEMICONDUCTOR DEVICE AND SEMICONDUCTOR DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a driving circuit for a semiconductor device which can suppress an increase in continuity loss at high frequencies without lowering switching characteristics of a semiconductor switch and the semiconductor device which is usable as a wide-band high-frequency switch and has superior switching characteristics. SOLUTION: The semiconductor switch 1 is composed of two MOS transistors 1a and 1b and has a couple of main terminals 2a and 2b connected to a feed line for a high-frequency signal and a couple of input terminals 3a and 3b supplied with a control signal, and the driving circuit 10 is connected between the input terminals 3a and 3b. The driving circuit 10 has a driving power source 11 which supplies the control signal between the input terminals 3a and 3b and a noise eliminating filter 12 which is inserted between the input terminals 3a and 3b and the driving power source 11 and eliminates common-mode noise. The noise eliminating filter 12 has equal-constant conductors L1 and L2 inserted between the input terminals 3a and 3b and the driving power source 11.