Full wave bridge rectifier circuit recommendations needed
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Posted by eljainc on April 1, 2008, 10:34 pm
Please log in for more thread options I have an AC signal that varies between 0-15VAC that I would like to rectify/convert to a standard DC signal (0-15VDC). I realize that a full wave rectifier along with a capacitor filter circuit can produce a more DC like signal. Is there an IC or circuit that can remove the ripple almost entirely? The current involved is low (on the order of 20mA to perhaps as much as 100mA). Any thoughts or ideas welcome. Thanks. Mike | ||||||||||||||||
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Posted by Phil Allison on April 1, 2008, 11:08 pm
Please log in for more thread options "eljainc" > I have an AC signal that varies between 0-15VAC
** What frequency, what wave shape, how does it vary and how fast ? Why did you leave all this out ? Reckon it don't matter ? > that I would like to
> rectify/convert to a standard DC signal (0-15VDC). ** How fast does this DC level need to rise and fall in response to changes in the AC one ? Why did you leave this out ? Reckon it don't matter ? > I realize that a
> full wave rectifier along with a capacitor filter circuit can produce > a more DC like signal. Is there an IC or circuit that can remove the > ripple almost entirely? ** Yeah - add a DC filter choke in series and a second filter cap. LOL ! > The current involved is low (on the order of
> 20mA to perhaps as much as 100mA). > > Any thoughts or ideas welcome. ** Explain just what it is YOU are trying to do !!! Seeing as you have ZERO ability to write a technical specification - maybe we can decipher it from the nature of the task. ...... Phil | ||||||||||||||||
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Posted by Zed on April 1, 2008, 11:13 pm
Please log in for more thread options Hi, there
KA7815 may help. You may dowload KA7815 from this address: http://www.datasheetcatalog.com/datasheets_pdf/K/A/7/8/KA7815.shtml You could check the application circuit on page 21. hope this will help | ||||||||||||||||
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Posted by Phil Allison on April 1, 2008, 11:16 pm
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( snip totally asinine advice ) ** Zed = Zilch. Which equals how much this trolling FUCKWIT knows about anything. Piss off Zed head. ...... Phil | ||||||||||||||||
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Posted by Bill Bowden on April 2, 2008, 1:21 am
Please log in for more thread options > Hello,
> > I have an AC signal that varies between 0-15VAC that I would like to > rectify/convert to a standard DC signal (0-15VDC). I realize that a > full wave rectifier along with a capacitor filter circuit can produce > a more DC like signal. Is there an IC or circuit that can remove the > ripple almost entirely? =A0The current involved is low (on the order of > 20mA to perhaps as much as 100mA). > > Any thoughts or ideas welcome. > > Thanks. > Mike Well, you could use an DRC circuit (Diode / resistor / capacitor in series) so the voltage on the capacitor represents the peak of the AC signal minus the diode drop. If the AC signal is 15 volts RMS, sine wave, the peak will be about 1.414 times higher or 21.21 volts and the diode will reduce that by about 700mV, so you get 20.51 on the capacitor. But you can't put any load on it (no current) or the voltage will fall. You could use an opamp to buffer the voltage so the external load doesn't affect it much. -Bill | ||||||||||||||||
