Electro-Magnetic World

The common cathode triode vacuum tube amplifier is the most used circuit configuration in the audio pre-amplifier applications. One simple ...

The pentode is a vacuum tube which has five electrodes, plate or anode, cathode and three grids G1, G2 and G3. The G3 grid is the suppresso...

The triode as vacuum tube is one of the most used active element in audio amplifier circuits. The low power dissipation triode tubes are us...

A cascade voltage multiplier circuit converts the lower AC voltage to a higher DC voltage. Typically, this circuit is using a network of ca...

The most used couplings in the oscillation circuits and selective amplifiers are the transformer coupling, inductive or capacitive divider....

The selective amplifier is a class of signal amplifiers which works at high or very high frequencies. These amplifiers are applied for ampl...

The circuit configuration shown on Picture 1 is called zero-crossing detector. The inverted input of the operational amplifier is connecte...