The operation of circuit.
The input signal is entered to C1 pass through a low pass filter circuit with R2,C2 to the difference input circuit Q1(MPSA93),Q2(MPSA93) to Q4(MPSA43),Q5(MPSA43) that as act to amplifier a input signal to Input signal to be strong enough to drive the gate of the output MOSFET. (Q8,Q9)
The diode (1N4148) D2,D3,D4,D5 It is a protection circuit to drive the gate of the MOSFET is too strong. May cause damage to the power MOSFET.
The Q6(BC546),Q7(BC556) It controls the voltage supplied to the driver. not change follow the swing of the power supply, while we turn on the high power. And prevent noise that feed back to from the power supply wires, thus reducing noise of the circuit as well.
The operation of circuit.
The input signal is entered to C1 pass through a low pass filter circuit with R2,C2 to the difference input circuit Q1(MPSA93),Q2(MPSA93) to Q4(MPSA43),Q5(MPSA43) that as act to amplifier a input signal to Input signal to be strong enough to drive the gate of the output MOSFET. (Q8,Q9)
The diode (1N4148) D2,D3,D4,D5 It is a protection circuit to drive the gate of the MOSFET is too strong. May cause damage to the power MOSFET.
The Q6(BC546),Q7(BC556) It controls the voltage supplied to the driver. not change follow the swing of the power supply, while we turn on the high power. And prevent noise that feed back to from the power supply wires, thus reducing noise of the circuit as well.
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