| 摘要 |
A bias circuit according to the present invention includes: a transistor for supplying a bias current from the emitter of the transistor; an emitter potential generating device for supplying a potential to the emitter of the transistor; a switch element; and a voltage supply circuit for supplying a base voltage to the base of the transistor in response to the on/off of the switch element, wherein the emitter potential generating device generates a potential causing a potential difference between the base and emitter of the transistor to fall below a saturation voltage at the junction of the transistor, even in the case where the base of the transistor is fed with a voltage not lower the saturation voltage at the junction of the transistor. |
