Hi people, i need to make a power amplifier for the following application. plz suggest me a simple as possible power amplifier which works in the audio range that is from 20Hz to 20KHz bcz my application works on 40KHz and 50KHz. i just need this plz help. thanks. and with the least components plz. the power amplifier i need should have a gain of 30dB.... and also tell me that how should i calculate the power of my FSK signal as shown in the attached image http://i452.photobucket.com/albums/qq242/kahafeez/myrequirement.jpg

 

image is attached here http://i452.photobucket.com/albums/qq242/kahafeez/myrequirement.jpg

 

Hello,

Did you already consider the LM12 power op-amp?
See datasheet for the specs.

Greetings,
Bertus

 

thanks dude, i dont really want 80Watts.....


i found this IC called LM386 which gives 1Watt. and LM380 which gives 2.5W. thanks

 

Hello,

I think the LM380 and LM 386 do not reach such high frequencies.
The LM12 reaches 100 khz.

Greetings,
Bertus

 

ya dude, bt i asked for an audio amp.... that is 20Hz to 20KHz .... this suits me well

 

The circuit drives an antenna. It must be an extremely long antenna for such a low frequency.

The LM386 little power amp has a response that is -3dB at 300kHz when its gain is 20 (26dB).

 

6,200 feet will give him a 1/4 wavelength antenna for 45kHz.

Yep, that's a rather long antenna.