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How to install 2n3055 transistor11/7/2022 With the base held at 12 volts, the voltage drop of the base-emitter junction will determine the exact output voltage. In effect, the added diode is intended to compensate for the transistor base-emitter voltage drop. Apply this as appropriate to the following. Combining the two suggests that the base voltage will be in the range of 12.1 to 13.3 volts. I was also ignoring the fact that 7812s have a nominal output in the range of 11.4 to 12.6 volts. If the 7812 output is at 12 volts, then depending on the current levels at the load the output voltage will be less than 12 volts, and possibly a good deal less.ĮDIT - As Russell McMahon pointed out, I was ignoring the diode in the linked circuit. Has no effect on the gain in the audio band which is set by the feedback network.In fact, the output is not held at exactly 12 volts. No, its function is to stop the amplifier oscillating, its a Miller compensation capacitor and it The capacitor C2 regulates a higher frequency (Gao Yin), and as the capacitance increases, it becomes louder and louder at higher frequencies Would be a wise precaution against oscillation into difficult loads too. Pair driving a current mirror, so its going to be pretty non-linear from the get-go. For instance the input stage isn't a differential There are a lot of improvements that can be made to that circuit that will reduce the distortion significantly,Ĭheckout the works of Douglas Self, Bob Cordell and others. Is the way to go, 3281/1302 output devices being a good choice. Handling with the right combination, but note that a discrete darlington from carefully selected components Yes you can use darlington output stage, you'll need a higher bias voltage and you'll get better current The 2N3055 is 50 years old and a pretty poor performer - no self-respecting new design should be using it(!) Then you could use a fully complementary output section rather than the quasi-complementary one in that diagram. The modern equivalent, much better gain and speed, would be something like the NJW3281 and NJW1302Ĭomplementary pair. However,I have a question: Can I use other NPN type power transistor instead of 2N3055? The current can be regulated by a 500 Omega resistor setting. The capacitance C1 regulates low frequency (bass), and as the capacitance increases, the low frequency becomes louder and louder.The capacitor C2 regulates a higher frequency (Gao Yin), and as the capacitance increases, it becomes louder and louder at higher frequencies.This is a class B amplifier, which means that the push-pull output transistor must be applied to a quiescent current, even without any input signal. It biggest input voltage is about 0.8V to 1V.and the output power is about 60W. This circuit is simple and the cost is low.The best power supply voltage is about 50V while it works from 30V to 60V. " The saturation is that the emission junction is fully conductive and the collector current is the largest. The collector junction (the PN junction between the collector and the emitter) is the cut-off of the emitter junction, the collector has no current on the collector, and the collector junction conduces to the complete conduction between the collector, and the current of the collector varies with the current of the emitter (the transistor can amplify the current, and the current on the collector is equal to the current of the emitter multiplier by the magnification. The current of the base to the emitter controls the current of the collector to the emitter, and the triode has three states, cut-off, amplification and saturation, and two PN knots inside the 2N3055 three pole, and the emitter junction (PN junction between the base and emitter). The triode is a current type control device. It’s an audio power amplifier,and recently I find a lot of knowledge about power amplifier and I decided to make an audio power amplifier basic on 2N3055 transistor.As the article" how does 2n3055 work ": shows, 2N3055 transistor is a NPN power triode.the 2N3055 triode has three electrodes, a base pole (B), a collector (C) and a emitter (E). I am involve in an project that I need to hand it up to my school.
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