Configurable, variable gain, voltage/current amplifier
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Features (for now):
- 3.3v to 26v (+/- 12v) Supply voltage single supply or not
- 145 MHz GBWP, 7nV/Sqrt(Hz), low bias, etc (see opamp datasheet)
- User selectable gain from 1 to 9000
- can be configured as a current to voltage converter (transconductance amplifier) with gains of 10, 100 and 1000
- can be configured as a inverting or non-inverting amp
- AC/DC input selection
- footprints for BNC, SMA and header pins for the input and output.
Any other ideas are welcome.
AmpFarmer_v01.schEagle Schematic v0.1sch - 341.42 kB - 10/20/2016 at 16:18 |
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I've decided that if I will make this board I will do it right.
The new boards and the stencils are here from China and they look great. I will start assembling them soon.
Also... how does a 2nd order Sallen-Key filter, with variable cutoff frequency sound? Both LP and HP. (BP and BS with 2 boards)
My colleagues proposed that I should try to sell this device on Tindie. The costs would be about 17 Euros per board (19$). I've never really liked Tindie.
The board has footprints for BNCs, SMAs and 4 pin single line headers. You can solder whichever you want. I chose BNC because it was easier to connect to the analyzer. Can you give me a reference for the screw terminals?
You should totally sell this on Tindie. The amount of times i've had to quickly put together an op-amp circuit on a breadboard to amplify some sensor signal is crazy high. This would save all that hassle.
I know that feeling. I'm working on a new version of the board. Can you think of any other features to add?
Radu Constantin
The Big One
Justin Davis
John Duffy
Jan
The main thing I'd like to see would be get rid of the BNC connectors and use screw terminal connectors so you can hook up whatever wires you want. Using a BNC connector would restrict the usefulness of something like this for me anyways