| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an RF pulse signal generating-switching circuit capable of rapidly falling the wave of an RF pulse signal while maintaining a stable operation. <P>SOLUTION: A drain switching circuit 21 includes n-type first, second and third FETs 211, 212 and 213. Gates of the first and third FETs 211 and 213 are each applied with a control pulse, while the sources are grounded. Drain of the first FET 211 is connected to the gate of the second FET 212, and a drive voltage Vds is applied to the drain of the second FET 212. Source of the second FET 212 is connected to the drain of the third FET 213, with the connection point connected to the drain of a power FET 31. Between the gate and source of the second FET 212 is connected to a capacitor 215 that is for supplying charge for compensating a gate voltage when the second FET 212 transitions from Off to On. <P>COPYRIGHT: (C)2013,JPO&INPIT |
