| 摘要 |
PURPOSE:To suppress the amplitude fluctuations and level fluctuation of a limit output by connecting a first conductive amplifier to a second conductive amplifier whose type is different in series, and limiting the upper limit and lower limit of the output by the threshold level of a transistor. CONSTITUTION:This device is constituted of an (n) channel driving type CMOS amplifier 12, (p) channel driving type CMOS amplifier 13, input terminal 14, and output terminal 15. In the CMOS limiter amplifier, the threshold level of the transistor is used as the upper limit and lower limit of the output without using any resistance in a conventional manner so that the limit characteristic of the output can be obtained. Thus, the (n) channel driving type CMOS amplifier 12 is connected to the (p) channel driving type CMOS amplifier 13 in series, so that the upper limit and lower limit of the output of the limiter amplifier can be set. Thus, the output limit level of the limiter amplifier depends on the transistor characteristic. Therefore, the fluctuation of the output level can easily be reduced. |
