A circuit that adds a diode voltage that falls with temperature to a voltage that rises with temperature, producing a reference of about 1.2 V that barely depends on temperature. It is widely used in ADCs and power ICs.
They protect CPUs from overheating and monitor batteries, and combining the two temperature dependencies to cancel yields a bandgap voltage reference.
How does the forward voltage of a silicon PN junction at co…1/f noise (flicker noise) CMRR (common-mode rejection ratio) Comparator Cutoff frequency Differential amplifier Gain-bandwidth product (GBW) Instrumentation amplifier LDO Negative feedback Operational amplifier (op-amp)