| 摘要 |
PURPOSE:To ensure a stable supply of the reference voltage over a wide range, by putting a resistance between the base of an output transistor of a band gap regulator and an earth to obtain a variable negative temperature coefficient. CONSTITUTION:A power supply terminal 1 is connected to an output terminal 3 of the reference voltage via a current supply circuit 2, and the terminal 3 is connected to an end of each of resistances 5 and 7 as well as to the collector of a transistor (TR)10 respectively. A common contact of the collector of a TR8 and the resistance 7 is connected to an earth terminal via a resistance 11. The negative temperature coefficient of an equation showing the reference voltage is variable by a resistance ratio R7/R11, and an optional negative temperature coefficient is obtained. Therefore the zero temperature coefficient is obtained for the reference output voltage by controlling the ratio R7/R11. |
