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How can i convert square wave to sinewave of same frequency? - RF
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khalil_cse@yahoo.com Post subject: How can i convert square wave
to sinewave of same frequency? Unread postPosted: Sun Mar 20, 2005
2:20 am
Hi Anybody can help me to design a circuit to convert
square wave to sine wave of same frequency to build local oscillator
for radio card. khalil
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Guest Post
subject: Unread postPosted: Sun Mar 20, 2005 9:40 am
If you
perform a Fourier Series of a square wave you will see that it is made
up of multiple frequencies, in particular, high frequency components.
Therfore, to convert a square wave to a sine wave, you simply filter
out the higher order components by using a low pass filter that will
pass the frequency of the square wave (1/period) and reject the higher
order components.
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chaitanya Post subject:
need the same help as u need Unread postPosted: Tue Apr 12, 2005
4:13 am
If u get pls forward to saichaitanya@indiatimes.com..thanks..and
pls
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Guest Post subject: Square to Sine
for LO Unread postPosted: Mon Apr 18, 2005 10:07 pm
Actually,
most of the time you want your mixer to act as a switch, rather than
as a linear multiplier. This is the reason for running standard diode
double balanced mixers at the rated power (+7/17/27dBm) - to get good
switching action. This gives you better 3rd order intercept performance,
for example.
What frequency range are you looking at? A low pass
filter only works if you have somewhat less than a 3:1 frequency range.
People have used tunable bandpass filters (such as those made by Pole-Zero
Corp) to cover wider ranges.
Good Luck!
Posted 11/12/2012
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