Comments on: Consider PWM signal http://www.scienceprog.com/consider-pwm-signal/ ScienceProg serves scientific, embedded, biomedical engineering, physics based contents. If you want your article or scientific project to be on this site, do not hesitate to contact and send to scienceprog@gmail.com. Mon, 13 Oct 2008 05:40:44 +0000 http://wordpress.org/?v=abc By: Avinash http://www.scienceprog.com/consider-pwm-signal/#comment-18305 Avinash Wed, 06 Feb 2008 17:17:40 +0000 http://www.scienceprog.com/consider-pwm-signal/#comment-18305 Hi, if i want to generate analogue waveform (sin of frequency f) then what is the value of C and R required to get undistorted output. Hi,
if i want to generate analogue waveform (sin of frequency f) then what is the value of C and R required to get undistorted output.

]]> By: scienceprog http://www.scienceprog.com/consider-pwm-signal/#comment-39 scienceprog Wed, 07 Jun 2006 09:59:48 +0000 http://www.scienceprog.com/consider-pwm-signal/#comment-39 You may try to look at so called <a href="http://www.ipes.ethz.ch/ipes/2002hoch/e_hochBuck.html">Buck-Converter</a> And of course <a href="http://en.wikipedia.org/wiki/Buck_converter">Wikipedia</a> I hope this gives some idea... You may try to look at so called
Buck-Converter
And of course Wikipedia

I hope this gives some idea…

]]> By: Mark http://www.scienceprog.com/consider-pwm-signal/#comment-38 Mark Tue, 06 Jun 2006 20:26:49 +0000 http://www.scienceprog.com/consider-pwm-signal/#comment-38 I am hoping to use this idea for a project. I want to send a PWM signal from a microprocessor, and, through the duty cycle, create a corresponding analog voltage. This is straight out of the article. The problem is, this analog voltage has to be a constant voltage, it cannot be varying (ie from your example of a 50% duty cycle and a 5V amplitude we would see an average 2.5V analog voltage, but i need this 2.5V to be effectively constant instead of just averaged). I dont know if the low pass filters can effectively achieve this or what. Any help would be greatly appreciated! I am hoping to use this idea for a project. I want to send a PWM signal from a microprocessor, and, through the duty cycle, create a corresponding analog voltage. This is straight out of the article. The problem is, this analog voltage has to be a constant voltage, it cannot be varying (ie from your example of a 50% duty cycle and a 5V amplitude we would see an average 2.5V analog voltage, but i need this 2.5V to be effectively constant instead of just averaged). I dont know if the low pass filters can effectively achieve this or what. Any help would be greatly appreciated!

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