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.