Products > Test Equipment

Amplifier for Function Generator needed (500 mA)

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BeBuLamar:

--- Quote from: T3sl4co1l on September 22, 2018, 01:38:26 pm ---Almost any audio amp circuit or buffer IC will do.

Building, or off-the-shelf, plug and go?

Tim

--- End quote ---

Audio amplifier can have bandwidth more than 20kHz but may not reach 100kHz without some loss.

Mechatrommer:

--- Quote from: 21KUZY073 on December 16, 2022, 05:10:03 pm ---Did you test your amplifier? Bandwidth and so on... Have you some picture from oscilloscope?

--- End quote ---
this is 4 years old thread... what took you so long to ask? today we have few $20 FG buffer from china that can go MHz. i recently built one using basic class AB amplifier that about 0.1dB flatness to 300kHz that i will later aim to be able to source/sink 5-10App current...

mawyatt:
Here's a few that are more up to date, just do search and you'll find lots of related discussions.

https://www.eevblog.com/forum/projects/precision-opamp-power-stage-to-increase-v-and-i-out/msg4433602/#msg4433602

https://www.eevblog.com/forum/testgear/awg-buffer-amp/msg3368650/#msg3368650

https://www.eevblog.com/forum/testgear/cheap-diy-high-powervoltage-awg-buffer-amp/msg3449784/#msg3449784

https://www.eevblog.com/forum/testgear/hv-buffer-amp-for-awg/msg3623953/#msg3623953


Best,

gamalot:
This post reminds me that I have two OPA549M that I bought on ebay for 10AUD/pc about 5-7 years ago, maybe it's time to test if they are genuine.

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