Today I get an email from Kunal Banerjee, send a preamplifier project to published for all to see.
It is a very simple amplifier circuit using transistor 2N3904 only. Though very small, but it still has many uses.
He says it low noise than normal IC circuits. and extremely low distortion. Frequency response: 20 Hz to 20 kHz.
It is a high gain but low power output and inverts signal output.
In-circuit diagram or schematic which is set circuit in the common emitter.
In electronics, a common emitter amplifier is used as a voltage amplifier.
In this circuit the base terminal of the transistor serves as the input, the collector is the output, and the emitter is common.
We can use this circuit to increase the lower signal to higher before send to a normal amplifier which low gain but high power.
How to build it
Also He send me the PCB SILK as components layout see below.
And the PCB layout.
C1: 1uF 25V Electrolytic
C2: 0.1uF 50V Ceramic or Mylar
Q1: 2N3904, NPN transistor
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