Signal-amplification-type light-operated LED control system based on current adjusting circuit
A current adjustment and signal amplification technology, applied in the field of electronics, can solve the problems of unstable output current and inaccurate brightness signal processing, and achieve the effect of prolonging service life, suppressing zero drift and ensuring stability.
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[0022] Such as figure 1 As shown, the present invention mainly consists of a control chip U1, a brightness sensor, a triode VT1, a resistor R3, a resistor R4, a polar capacitor C4, a Zener diode D2, a buffer trigger circuit, a signal amplification circuit, a signal receiving circuit, and a current adjustment circuit. and a linear drive circuit.
[0023] During implementation, the N pole of the Zener diode D2 is connected to the VDD pin of the control chip U1, and its P pole is connected to the base of the triode VT1 after passing through the resistor R3. The positive pole of the polarity capacitor C4 is connected to the CTH pin of the control chip U1 through the resistor R4, and the negative pole thereof is grounded. The signal receiving circuit is connected with the brightness sensor. The signal amplifying circuit is connected in series between the signal receiving circuit and the ANT pin of the control chip U1. The current adjustment circuit is respectively connected with...
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