| 摘要 |
A stabilized current output circuit having a DC power source with a pair of terminals, a series circuit consisting of m number of diodes which is connected at one end thereof to one terminal of the DC power source and at the other end thereof to the other end of the DC power source, a first transistor forming a first current mirror circuit together with the last diode of the series circuit located nearest to the other terminal of the DC power source, the last diode being connected between the base and emitter of the first transistor, a first resistor connected between the first diode of said series circuit and said one terminal, a second resistor connected between the collector of the first transistor and the one terminal of the DC power source, a diode connected between the collector of the first transistor and the other terminal of the DC power source, and an output transistor which is connected at the base thereof to the collector of the first transistor. In this case, the output transistor and the last-mentioned diode form a second current mirror circuit, and the resistance values of the first and second resistors are selected in connection with the number m to produce a stabilized constant current at the collector of the output transistor. |
