Simple reference voltage generation circuit using shunt regulator

The circuit in Figure (a) is used for the regulator circuit. The output voltage y oit
is determined by the formula vout = (1+Rl}Rz) × 2.5. In order to output ioVr, set Ri =
3Rz, and set the bias resistor to B and v. It is related to the load current IL. It should be made that RB ≤ (v.
-v. 21)/ILo. Once the load current of the shunt adjustment circuit is reduced, in order to keep the clamp-
out voltage unchanged, D absorbs the current from Ic meters. TL.431 output impedance When it is several iokHz-
or above, the CL capacitance should be increased to more than 1UF as needed.
    Figure (6) is a very simple current conversion circuit. The open-loop gain of TL431
is about sOdB, and the conversion current stability is very good. In order to make current sense electricity.
Resistor 5 produces a voltage of 2. sv, and the base of the transistor must be controlled.