Laser output conditioning
Laser output conditioning
(OP)
I would like to condition a signal generated by a laser that profiles the product we run. The output is a +/- 5vdc but the type of profile the laser generates actually produces a 50 - 200mv ac signal @ around 850Hz. I would like to look at only the ac signal and produce a 0-10 vdc output. The ac peak to peak signal is a representation of the profile I need. As the peak to peak signal gets larger, I want my output to get larger. I appreciate any help, Thanks in advance.





RE: Laser output conditioning
Then you just need enough gain in the amplifier to bring your signal up to the desired output level. For a 200mv signal in to get a 10V signal out requires a gain of 50.
RE: Laser output conditioning
RE: Laser output conditioning
If you use an Opamp for the amplifier, the front end resistance will be at least 100Kohm for run of the mill parts up to several Gigohms for FET input parts. If you use a part with a 100Kohm input, then your capacitor can be 10uF or larger. Use a tantalum part, if possible, to get the best noise performance.
Good luck with the project.
RE: Laser output conditioning
RE: Laser output conditioning