Bandgap reference voltage source
A reference voltage source and reference circuit technology, applied in the field of electronics, can solve problems such as large temperature coefficient, and achieve the effects of low temperature coefficient, high power supply rejection ratio, and lower temperature coefficient
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[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0019] Such as figure 2 As shown, the bandgap reference voltage source of the present invention comprises a start-up circuit, a core bandgap reference circuit and a high-order compensation circuit, the core bandgap reference circuit is used to generate a reference output voltage, and the high-order compensation circuit segmentally compensated by the core bandgap The reference output voltage generated by the reference circuit.
[0020] The specific circuit diagram is as image 3 As shown, among them,
[0021] The core bandgap reference circuit includes: PMOS transistors M1, M2, M3, NPN transistors Q1, Q2, and resistance units R1, RB1, RB2, RA;
[0022] The high-order compensation circuit includes: PMOS transistors M4, M5, M6, M7, M8, M9, M10, M11, NPN transistors Q3, Q4, Q5, Q6, Q7, Q8, and resistance units R2, R3;
[0023] The specific con...
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