Mar 29, 2015 #1 Y ymmen Member level 1 Joined Nov 4, 2014 Messages 35 Helped 0 Reputation 0 Reaction score 0 Trophy points 6 Activity points 244 can anyone please send me a working circuit of a collpits oscillator from opamp 741? Also plz explain what steps to follow to make our own collpits oscillator using opamp.
can anyone please send me a working circuit of a collpits oscillator from opamp 741? Also plz explain what steps to follow to make our own collpits oscillator using opamp.
Mar 30, 2015 #2 A amayilsamy Advanced Member level 1 Joined Feb 5, 2013 Messages 420 Helped 38 Reputation 76 Reaction score 34 Trophy points 1,308 Location Chennai,India Activity points 3,370 Try this.. https://www.electronics-tutorials.ws/oscillator/colpitts.html
Mar 30, 2015 #3 B BradtheRad Super Moderator Staff member Joined Apr 1, 2011 Messages 15,178 Helped 2,899 Reputation 5,810 Reaction score 2,982 Trophy points 1,393 Location Minneapolis, Minnesota, USA Activity points 113,699 Experimental simulation. It looks as though it ought to work. The op amp output is square waves. The output changes state when C1 crosses 0V. This is the instigator for the LCC resonant loop. You take the signal from one of the capacitors. The L:C ratio is thousands-to-1, which is in the range typically found to work in LC resonance circuits.
Experimental simulation. It looks as though it ought to work. The op amp output is square waves. The output changes state when C1 crosses 0V. This is the instigator for the LCC resonant loop. You take the signal from one of the capacitors. The L:C ratio is thousands-to-1, which is in the range typically found to work in LC resonance circuits.
Mar 30, 2015 #4 Audioguru Advanced Member level 7 Joined Jan 19, 2008 Messages 9,457 Helped 2,151 Reputation 4,302 Reaction score 2,008 Trophy points 1,393 Location Toronto area of Canada Activity points 59,717 The lousy old 741 opamp was introduced 47 years ago. It has trouble above only 9kHz. Any half-decent opamp today performs well up to 100kHz.
The lousy old 741 opamp was introduced 47 years ago. It has trouble above only 9kHz. Any half-decent opamp today performs well up to 100kHz.