| 摘要 |
PROBLEM TO BE SOLVED: To provide a limiter circuit of excellent limiter balance characteristics suitable for being made into an IC and contributing to the miniaturization of an electronic equipment and the improvement of manufacture efficiency. SOLUTION: The emitters of two transistors T101 and T102 are connected to each other and the transistor T103 and a resistor R104 constituting a current source are provided between the emitters connected in common and the ground. In the current source, the size of the amplitude of signals outputted from an output terminal 2 is controlled by a potential inputted from an output control terminal 3. The signals from the collector of the transistor T101 are divided by a resistor R102 and a resistor R103 and the divided signals are impressed to the base of the transistor T101 and negatively fed back. Further, the signals from the collector of the transistor T102 are divided by a resistor R106 and a resistor 107R, DC components are extracted from the divided signals, applied to the base of the transistor T102 and negatively fed back and the amplitude is limited. |
