OSC and unity gain buffer

eeaj2002 · 2008-04-10T00:30:07+00:00

Hi all,I need help with my circuit please. I have a one MHz osc fed into thepositive input of the opamp LMC6484 and the negative terminal isconnected to the output (unity gain buffer). At the positive inputterminal I have the 1MHz. from the oscillator and I should see one MHzat the output as well but I see distorted sine wave signal. If thegain bandwidth of the opamp is 1.5MHz. should not I see one MHz. atthe output of the opamp as well. I did run the oscillator at 3.0Volts and the opamp at 15V.Thanks for you help in advance,John.

Apr 10, 2008 21 Replies

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Tom Del Rosso 18 years ago

That paragraph should be in the 3rd edition of AoE.

Reply in group, but if emailing add another zero, and remove the last word.

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Tim Wescott 18 years ago

I didn't say that that's the _correct_ design philosophy, just that it's _the_ design philosophy for op-amp (circuit) designs.

If I say that I believe that tube-based amplifiers are the only way to go, will you send me that contract for $100K? For another $50K I'll believe that it needs an output transformer with nickel laminations and all-silver windings, plus a choke feed with similar construction. If you want I'll even specify that all the current-carrying components must be dipped in LN2 before assembly, to align their crystalline structure for better sound.

Tim Wescott Control systems and communications consulting http://www.wescottdesign.com Need to learn how to apply control theory in your embedded system? "Applied Control Theory for Embedded Systems" by Tim Wescott Elsevier/Newnes, http://www.wescottdesign.com/actfes/actfes.html

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