ABSTRACT
The main sub-blocks of analog and mixed-signal integrated circuits, such as amplifiers, oscillators, and data converters require biasing circuitries to bias their transistors. The circuit designated to provide biasing voltages to these transistors is generally known as biasing circuitry. The basic element in the biasing circuitries is a current source and current mirror. Voltage reference or current reference circuits are specifically designed circuits to provide constant voltage or current across the process, voltage, and temperature. The voltage reference is typically a combination of current sources. Fortunately, the complementary metal-oxide semiconductor transistor is a current source. A high temperature linear voltage regulator requires a high-performance error amplifier. A temperature stable biasing current will prevent the power consumption of the error amplifier from increasing needlessly over temperature, and preserve its stability.
