Waveform amplification and distribution

[Jake1]

Hi,

I have a waveform generator that can produce a 5V output and I need to amplify it to 24V and 0.2amps along 6 different channels. I would ideally like some sort of dock that I could plug an external power source into with 6 independent amplifiers that could take the original waveform and distribute it to 6 different circuits. Im a little stuck on how to do this. Does anyone know how it could be done?

Thanks,

Jake.

[Vovk_Z]

It depends on a signal frequency. Up to 100-200 kHz you can use usual audio IC (TDA2030/2050, LM1876, TDA7294, LM3886 etc)

[David Hess]

We need to know the frequency or transition time requirements to know what kind of gain-bandwidth product and full power bandwidth or slew rate is required.

[Jake1]

Hey David,

The frequency will be low around 1-2Hz. The output amps from the waveform generator will be around 0.2amp and this shouldn't change. I need an identical signal but with an increased voltage.

[David Hess]

That is well within the audio band so an integrated audio power amplifier will likely work well.  Power operational amplifiers are also feasible but likely more expensive.

I would use a circuit similar to the one shown below but I would add Vbe current limiting using the emitter resistors on the output transistors.  See figure 2 of Linear Technology application note 18 for an example of this and another example of a similar circuit which would work and many more.

A pair of quad operational amplifiers could also be used with the operational amplifiers all in parallel.  This is probably the least expensive solution.