| 摘要 |
PURPOSE:To obtain a reference voltage generating circuit which has the reduced current consumption and a corrected temperature level without using any special constant current circuit, by having connection with a specific method among three transistors, two resistances and a current mirror circuit respectively. CONSTITUTION:Transistors TR 1 and 2 have their bases connected in common with each other. The collector and the base of the TR 1 are connected to each other with the emitter grounded. The emitter of the TR 2 is grounded via a resistance 3, and the collector of the TR 2 is connected to current mirror circuits 4-6 which supply the current equal to that flowing to the TR 2 to the TR 1 at one side and to a resistance 7 and a TR 8 at the other side. The TR 8 has its collector and base connected in common to a diode and is cascaded to the resistance 7 to be grounded. Then the emitter area ratio between both TR 1 and TR 2 and the resistance ratio between both resistances 3 and 7 are controlled so that the temperature coefficient of the base-emitter voltage of the TR 8 is corrected by the voltage produced at the resistance 7. Thus the reference voltage Vx is generated at both ends of the resistance 7 and the TR 8 respectively. |
