Super Zener Diode Circuit Diagram ~ Circuit knowledge

Wednesday, October 1, 2014

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Although the temperature coefficient of the super zener circuit can be optimized by careful dimensioning of the components, there exists a still better way for making a precision voltage reference.
It is generally known that the accuracy of measurements in electronic circuits is mainly a function of the stability and reliability of the reference against which the unknown quantity is compared.
The zenerdiode in Fig. l is a usable reference device for , applications where the above i three parameters are not subject to appreciable variation.
The "super zener" in Fig.2 features excellent stability and is hardly affected by variations in the supply voltage and the load current.
The term band gap refers to the difference between two discrete energies of the outer four electrons in a semiconductor atom. Electrons in the highest energy band contribute to the conduction of the material.
There fore, everything feasible should be done to maintain the stability of the reference, i.e., counteract the adverse effects of variations in the ambient temperature, supply voltage, and load current.

Super Zener Diode Circuit Diagram