Application circuit composed of W7805 with continuously adjustable output voltage
As shown in the figure, the application circuit consisting of a W7805 positive integrated regulator and a F007 operational amplifier with an output voltage of 7 to 30 V is continuously adjustable. The F007 op amp in the circuit shown is used as a voltage follower whose power supply is based on the input DC voltage of the regulator. Since the general-purpose III op amp has a high input impedance and a low output impedance, it can overcome the variation of the regulator quiescent current Id.
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