A Quick Start Circuit of Bandgap Reference Voltage Source
A reference voltage source and quick start technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve the problems of high output, damage, and proportional amplification of the booster circuit, to eliminate overshoot, improve stability, To avoid the effect of device overvoltage
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[0023] The invention provides a fast starting circuit for a bandgap reference voltage source, which adds a current bias circuit to accurately control the starting reference voltage source (BGR). Such as figure 2 As shown, the bandgap reference circuit provided by the present invention includes a bandgap reference main circuit and a bandgap reference starting circuit.
[0024] The above bandgap reference main circuit further includes: PMOS transistors PM3, PM4 and PM5, an operational amplifier, resistors R0, R1, R2 and R3, and transistors Q1 and Q2.
[0025] Wherein, the negative input terminal VINN of the operational amplifier is connected to the emitter of the triode Q1, and also connected to one end of the resistor R1; the other end of the resistor R1 is grounded, and the base and collector of the triode Q1 are connected and grounded. The positive input terminal VINP of the operational amplifier is connected to one end of the resistor R2, and is also connected to the emitt...
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