High operating voltage voltage stabilization circuit diagram

It can be seen from the voltage equation Ue=Ut+Ur+Ua that the voltage Ut on the transistor will determine the maximum value of the output voltage Ua. At the same time, there should be Ur》2V. The voltage Ut depends on the selection of the voltage regulator value Uz. The selection of resistor R in Figure a must satisfy the boundary condition of Iz=Ib+Ir or the principle of Ir≈10·Ib. This circuit is suitable for situations where the integrated circuit has a higher operating voltage. When the voltage is lower, such as Ue=5V, the circuit in Figure b should be used. The voltage stabilization value of the voltage regulator tube should be at least 4V higher than the output voltage Ua. The selection of resistor R is the same as that of circuit a.

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