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02:55 PM
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Question for you electronic/circuit builders
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[quote:scimitar:MV8zNDY4MjI3XzYxOTkxNTM2X0RCOTgyQjAz] You lost me a bit. The laser sensor creates the sawtooth and you are trying discern attributes from it by generating and comparing against a know reference? Remember that you can generate a ramp for the sawtooth by charging or discharging a capacitor from a constant current source then restart with the opposite voltage through a low impedance pulsed switch. Here again the good old 555 timer IC works great for that. As has been stated there are a great many ways to do the same thing and analog is a great way to keep things simple, circuit wise, but a bear to calibrate. Digital is definitely the way to go. Depending on the actual process rates then either a micro controller for rather slow rates or accelerate it with an FPGA. Obviously we generally interface to an analog world so A/D and D/A converters or PWMs are hard to live without. [/quote]
Original Message
Is there any way to separate or filter out a sawtooth wave dependent upon which direction the saw tooth edge is?
ie, one part lead rises sharp and tapers for one signal and the other signal has a leading taper then a sharp drop in voltage.
I do not want to filter frequency, already have a passive low pass to cut high freq noise.
Just need to separate the two signals. (or omit one and then buffer, omit the other)
I am completely baffled on this one.
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