Get Transistor Preamplifier Circuit Diagram Images. In this circuit, the zero signal operation may be established by selecting resistance r1. You can use transistors either as a switch or an amplifier.
Here this simple preamp circuit is used for amplifying the aux output of mobile phone and amplifying the voice input given by the condensor mic or microphone.
It consists of a circuit of two transistors and four controls that can be vary the level preamplifier circuit diagram shown here has a. A transistor basically acts as a switch and an amplifier. The simple preamplifier circuit uses fixed bias. The circuit shown in diagram b is based on an npn transistor.
