| 摘要 |
PURPOSE:To increase the width of a variable oscillation frequency range greatly by connecting a p channel and an n channel MISFET in series between a power line and earth. CONSTITUTION:Between a power line 4 and earth, a p channel MISFETM4 and an N channel MISFETM5 are connected in series. The connection middle point between the FEts 4 and 5 is connected to the connection middle point A between an MISFETM2 and a resistance 5. Then, a p channel MISFETM7 is connected in series between the power line 4 and earth as well as a p channel MISFETM6. Further, an n channel MISFETM8 and an MISFETM9 are connected in series between the power line and earth. Consequently, control is so exercised by a control voltage V that only when the voltage of the FETM4 is less than a voltage VA, the FETM4 operates. The FETM5, on the other hand, is also controlled by the control voltage V to operate only when its voltage is less than a voltage VB. |
