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Very simple amplifier circuit using transistor 2N3904
https://www.eleccircuit.com/very-simple-preamplifiers-using-2n3904/
Basic transistors amplifier circuit using 2N3904 This is a basic transistor amplifier circuit. It is suitable to learn how the transistor works. We …
Class A single transistor amplifier with 2N3904 ...
https://electronics.stackexchange.com/questions/174223/class-a-single-transistor-amplifier-with-2n3904
The maximum rating for the 2N3904 is 625mW, so no surprise that the transistor gets hot fast. If you drop a TIP41C into the circuit you should still …
8 Simple 2N3904 Circuits for Beginners
https://www.apogeeweb.net/circuitry/simple-2n3904-circuits.html
2N3904 Voltage Amplifier Circuit | All About Circuits
https://forum.allaboutcircuits.com/threads/2n3904-voltage-amplifier-circuit.131589/
Schematic is for a CE Voltage Amplifier Circuit. According to Heath-Zenith, this circuit was designed for a centered Q-point. Component values are: R1 = 3.9K Ω, R2 = 1.5KΩ, Rc = 3.3KΩ, Re1 = 120Ω, RE2 = 1.5kΩ, C1 = C2 = C3 = 47uF, Transistor = 2N3904. Supply voltage = 20V Gain = 10 Icq = 3 mA
Microphone Preamplifier Circuit Using 2N3904 Transistor
https://circuits-diy.com/microphone-preamplifier-circuit-using-2n3904-transistor/
Microphone Preamplifier Circuit Using 2N3904 Transistor January 29, 2020 by Syed Saad Hasan 7,999 views A Microphone preamplifier is an electronic circuit that serves the purpose of pre amplifying weak audio signals. When the audio source (usually a microphone) sound level is too low.
Small Audio Power Amplifier Using Op-Amp and Two ...
https://www.deeptronic.com/electronic-circuit-design/small-audio-power-amplifier-using-op-amp-and-two-transistors/
Using two small transistors (2N3904 and 2N3906), we can build small power amplifier which deliver several hundreds milliwats. The basic circuit is a totem pole transistor pair with small biasing circuit configuration to give small leakage idle-current. Let’s see the schematic diagram of the circuit in the Figure 2.
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