You will use your filtered full wave power supply

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Unformatted text preview: to basically VC. Very small changers in the base- emitter voltage control the transistors output current and allow adjustment of the emitter current by slightly varying the voltage between the base and emitter of Q1. When the op- amp is combined with the pass transistor, the op- amp acts to adjust the output voltage VOUT so that it (or the fraction of it in the feedback circuit) always equals the reference voltage VREF supplied by the zener diode. Since the op- amp has essentially infinite gain, this will remain true even if the input voltage VC or the load RLOAD changes. For example, if the AC line voltage should decrease causing VC to decrease or if the load current increases, VOUT would normally decrease. However, when VOUT drops even a fraction...
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