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FUNCTIONAL BLOCK DIAGRAM IC 723







Functional Block Diagram of IC 723 Regulator


IC 723 has two sections. As shown in the block diagram,


functional block diagram ic723




A constant current Source:- A zener diode and a reference amplifier producing a constant voltage of about 7 volts at Vref end. The zener diode is being compelled to operate at fixed point (so that zener output voltage is a fixed voltage) by a constant current Source.


functional block diagram ic723




The second section of IC 723 comprises of an error amplifier, a series pass transistor Q1 and a current limiting transistor. The error amplifier compares a sample of output voltage applied at Inverting input terminal to the reference voltage Vref applied at the Non-Inverting input terminal.
The conduction of the transistor Q1 is controlled by the error signal.


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