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Power driver (or amplifier) for signal generator

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OM222O:
New circuit with BJTs as the drive stage and the correct load. The old driving stage is on the right side so feel free to drag and swap them around.

http://tinyurl.com/yy5j3ocg

26\$\Omega\$ at 3 amps is 78 volts ... not sure why you'd have such a high requirement, especially at those rise times: simply won't work.

do you need all of those requirements or under different loads?

A bipolar system is not more complicated than a unipolar one if you can find the right parts to handle voltages and currents.

For the adjustable voltage idea: it's very doable, use a switching regulator, preferably a buck converter and a digital pot that allows you to change the feedback network and set the voltage but it'd definitely won't be possible at the 10ns window. do you need all of the requirements at once?

Mechatrommer:

--- Quote from: OM222O on August 20, 2020, 05:29:15 pm ---New circuit with BJTs as the drive stage and the correct load. The old driving stage is on the right side so feel free to drag and swap them around.
http://tinyurl.com/yy5j3ocg

--- End quote ---
to my knowledge, that simplistic stage wont cut it if 10-50ns Tr is required. proper biasing need to be implemented to avoid full turning off of the bjt on either side at any time. but thats the easy part, the real deal is finding the bjt in real not sim world that can handle such BW at the mentioned power and load type requirement. 2cnts.

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