Inverting amplifier high bandwidth

168

02:02:17

*Goals
Vin = 250mV
Vout = 2.5V across 50 ohm load following 50 ohm at output. 
Vcc = Vee = 12V
Quiescent current 15mA or less. 
DC coupled
Flo <= 100Hz
Fhi >= 5M Hz

*My personal goal was to meet the specs as best as I could using as few transistors as possible, and i didn't want to use a diff pair. 

NPN 2N3904
PNP 2N3906
Diode 1N4148

Re-posted for a clean start free of troll comments. 

published 7 years ago

lenzrulz

7 years ago

Wi appears as though you’ve achieved your goals, well done!

crake

7 years ago

Thanks, lenz. That circuit isnt perfect but it was fun to build. It performed very well in the lab too, but it needed filtering at the power supply and thermal run away resistors.

ViolationMad

7 years ago

I like it, well done. I think I will build it up on a breadboard and do some sweep performance tests on it. 👌😂

crake

7 years ago

Glad you like it, ViolationMad. After you test it let me know what you think, if you don't mind.

matt2496

7 years ago

Did you use feedback compensation to help the frequency response?

crake

7 years ago

Yeah, with the feedback cap removed the response looks like this: http://everycircuit.com/circuit/6659898971783168

add comment in editor

EveryCircuit is an easy to use, highly interactive circuit simulator and schematic capture tool. Real-time circuit simulation, interactivity, and dynamic visualization make it a must have application for professionals and academia. EveryCircuit user community has collaboratively created the largest searchable library of circuit designs. EveryCircuit app runs online in popular browsers and on mobile phones and tablets, enabling you to capture design ideas and learn electronics on the go.