| 摘要 |
PURPOSE:To improve the linearity of an output of the limiter circuit, and also, to set an output voltage to arbitrary amplitude by constituting the limiter circuit so that a network is added between an output end of a negative feedback amplifier and a fetching point of a feedback signal, and the maximum output voltage is limited to a voltage set by the impedance of a load. CONSTITUTION:The limiter cirdcuit is provided with a negative feedback amplifier 10, and a network 13 connected between an output end of the negative feedback amplifier 10 and a fetching point of a feedback signal, and constituted so that the maximum output voltage which depends on a power supply voltage of the amplifier 10 is controlled to an output voltage determined by the network 13 and impedance of a load 15. The amplifier 10 operates normally as the negative feedback amplifier until its output voltage reaches the maximum output voltage determined by the power supply voltage of the amplifier 10, and an output voltage of the limiter circuit is determined by the maximum output voltage, the network 13 and the impedance of the load. In such a way, the linearity of the output voltage is satisfactory, and also, the amplitude can be set easily. |
