采用4 μm 40 V BJT商用工艺设计了一种基于JFET差分输入对的2.5 V电压基准源.内部结构包括JFET差分输入对、恒流源、PTAT电流源、运放、电阻分压器、短路保护.仿真结果表明本设计能够满足5 V~30 V宽电压范围、车规级温度范围应用,并具有低噪声、低温漂、低温度非线性等卓越性能.
Abstract
Fabricated by 4 μm 40 V BJT commercial technology
a designed voltage reference based on JFET differential input pair outputs 2.5V steadily
which is comprised of JFET differential input pair
constant current source
PTAT current source
op-amp
resistor divider
short-circuited protection. Simulation results show that the design lends itself well to a wide range of voltage application (5 V~30 V) and vehicle-level temperature application. Besides
low noise
low temperature drift
low temperature nonlinearity could also be expected.
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references
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