Hi, I have been looking for any schematic for a power amplifier for my function generator with little to no luck. I am still a beginner and don't have the knowledge to make one myself. I do understand a bit about how amplifiers work now after tons of research but I can't find any info on how to design a proper current/voltage amplifier that can handle 1 Hz to 30 MHz or if that is too big of a frequency range then split it up to like 3 different amplifiers that together can handle the bandwidth. Discrete amplifiers are all for 20 Hz–20/30 kHz as far as I can find or RF range from 10 MHz–1 GHz. My concept is to build one using high-speed, high slew rate op-amps in cascade or composite so that I can make the most of the bandwidth and slew rate, followed by a Class AB current amplifier stage using a Sziklai/CFP output stage. I haven't bought any high-frequency transistors yet or any op-amps as I am not sure how to do this. I don't trust myself to be able to build it even though I understand almost the whole concept besides VBE multiplier and how I would implement that. I have no idea really how slew rate/GBW etc. work more than that they dictate on the total gain available. I cannot be the only one here that wants more current and a bit higher VPP for my function generator, so I am writing this in the hopes that some others in my seat or someone that knows about this could come together and make a signal amplifier that has a dual-rail ±35–40 V input and similar output but with adjustable current between 0–10 A so that there aren't many things that can't be driven by a function generator.
Sorry for the wall of text and thanks for reading and maybe helping me with this.
AI: What kind of load are you planning to drive with the amplifier (for example, is it a specific resistance like 50 ohms, 8 ohms, or something else)?
The load could be anything, inductive, capacitive, motors, solenoids, transformers, etc.
AI: Do you need the amplifier to deliver the full ±35-40V output and up to 10A of current at the same time, or are those just the maximum ranges you want available?
It would be nice to have full 800 W at disposal but lower current than 10 A at full voltage isn't necessary, but at least 2–5 A.
Sorry for the wall of text and thanks for reading and maybe helping me with this.
AI: What kind of load are you planning to drive with the amplifier (for example, is it a specific resistance like 50 ohms, 8 ohms, or something else)?
The load could be anything, inductive, capacitive, motors, solenoids, transformers, etc.
AI: Do you need the amplifier to deliver the full ±35-40V output and up to 10A of current at the same time, or are those just the maximum ranges you want available?
It would be nice to have full 800 W at disposal but lower current than 10 A at full voltage isn't necessary, but at least 2–5 A.
