| 摘要 |
PURPOSE:To realize the amplitude limit circuit in which amplitude is limited only to a specific frequency range of an input signal. CONSTITUTION:The limit circuit is provided with an amplifier 33 and a filter circuit 20 receiving a 1st input signal and a 1st reference voltage VR1, a 1st comparator 21 comparing an output of the filter circuit 20 with a 2nd reference voltage VR2, a 2nd comparator 23 comparing the output of the filter circuit 20 with a 3rd reference voltage VR3, a 1st limit means driven by the output of the 1st comparator 21 and limiting an output of the amplifier 33 to a 4th reference voltage VR4 and a 2nd limit means 29 driven by an output of the 2nd comparator and limiting the output of the amplifier 33 to a 5th reference voltage VR5. For example, the limit circuit is applied to an actuator drive circuit or various signal processing circuits or the like and the amplitude limit having a wide characteristic is realized more than a conventional amplitude limit operation. |
