Collection Schematic

Showing posts with label class. Show all posts

Sunday, November 2, 2014

14W CLASS A AMPLIFIER USING 2N3055 ELECTRONIC DIAGRAM

Why Class A ? Because , when biased to class A, the transistors are always turned on, always ready to respond instantaneously to an input signal. Class B and Class AB output stages require a microsecond or more to turn on. The Class A operation permits cleaner operation under the high-current slewing conditions that occur when transient audio signal are fed difficult loads. His amplifier is basically simple, as can be seen from the block diagram.

Monday, September 22, 2014

300W Mosfet power amp OCL HIFI Class AB by K1530 J201

Younger student brother will take an interest to do electronics project sends a teacher. Then come to consult with me. He wants to build Mosfet power Amplifier 300W rms model the stereo Amp. Which be the character OCL the sound is good. I then try to seek the circuit gives him sees in rows the way , accidentally meet this circuit. which design by Anthony.E.Holton.

He designs this circuit well. Use power 2SK1530+2SJ201 MOSFET x 4 jigsaw puzzle parallel amounts. make have power amplify tall arrive at about 300W rms true power FULL watt. Detail other part want friends see in original circuit.

Tuesday, September 16, 2014

Simple Class B amplifier Opamp TL082

The circuit shown here is of a simple and easy Class-B audio amplifier based on opamp TL082, transistors TIP141 and TIP142. LM833 will be twin opamp with high slew rate and low distortion significantly designed for audio applications. This audio amplifier circuit will deliver 15 watt audio output into an 8 ohm speaker at +12/-12V DC twin supply.

Both opamps within the IC are used here. IC1a is wired as a buffer and capacitor C3 will the task of input DC decoupling. Ic1b is wired within the inverting mode and it provides negative feedback. Complementary power transistors TIP41 and TIP42 are wired within the class B push pull schematic and that they drives the loud speaker. Diode D1 provides 0.7V bias voltage for the push pull combine and capacitor C2 protects the 0.7V bias voltage across D1 from serious voltage swings at the IC1b’s output.

Notes :

The audio amplifier circuit must be assembled on a good quality PCB.
Use a holder for mounting IC1.
Use a +12/-12V dual supply for powering the amplifier.
Potentiometer R2 can be used as a volume control.
Raising the power supply voltage will increase the output power. Anyway note the following points.
TIP42 and 41 can handle only up to 6A.
Maximum supply voltage IC1 can handle is +16/-16 V DC.