Amplifiers

7 simple amplifier circuit diagram using transistor

I like to collect many circuits, including the simple audio amplifier circuit diagrams using transistors, too. Although we currently use ICs very much. Because it is small, convenient and cheap. It is convenient to use transistors. But the transistor circuit is still interesting to learn, and still charming in its uniqueness. When you need to … Read more

Wideband Active Antenna amplifier circuits on SW/MW/FM

Wide band Active Antenna amplifier in SW_MW_FM bands

These are the wideband active antenna circuits for the SW/MW/FM radio receiver. We can try to test it with many brands of radios. Why should we use this circuit? In normal, we short-wave radio receiver. We need to use a long antenna. But with the helping of this circuit, we can use the only 18-inch … Read more

4 Simple Audio Mixer Circuits diagram using FET and ICs

Simple Audio Mixer Circuit using 2N3819 FET

This circuit is a simple mixer circuit. It can mix two signal channels and one channel is output. Using a codec circuit, Convert stereo audio to mono audio time. Simple FET Audio Mixer Circuit In-circuit a FET number 2N3819 is main, it is better than common transistors that a high impedance input and high gain … Read more