Back in the palmy days, I once managed to make an integrator oscillate--huge Cf, small Rin, and an op amp with a big Rout.
Apart from tyro's mistakes like that, though, why would anyone need to simulate an integrator? A tiny bit of algebra will tell you all you need to know about it, over all relevant operating conditions--that one small formula has as much information as a year's worth of simulations.
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal ElectroOptical Innovations 55 Orchard Rd Briarcliff Manor NY 10510 845-480-2058 email: hobbs (atsign) electrooptical (period) net http://electrooptical.net
If you were concerned about the last tenth-degree of phase shift at
100 KHz, you might fire up LT Spice and plug in various opamps.John
Sure, and it would lie to you, but you'd feel much better.
Cheers
Phil Hobbs
-- Dr Philip C D Hobbs Principal ElectroOptical Innovations 55 Orchard Rd Briarcliff Manor NY 10510 845-480-2058 email: hobbs (atsign) electrooptical (period) net http://electrooptical.net
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Don, you are killing me, PLL and counter. I just checked your "Active Filter Cookbook" and it only has one mention of an "All Pass filter" with no schematic nor equations. As is mentuioned in this thread, no simulation is necessary except to see how constant the gain is over the 0 to 180d phase shift. Ok, back in 75 that book was very helpful, used it for maybe 10 years then moved on. Thanks, Harry
-- For your simulating pleasure:-) news:gqait6htotvmd31v1946c49f1304bnv7bs@4ax.com
News links do not always work. If your provider does not have the archive. Any other pointers to the article?
-- No, but I can email you a copy if you're interested.
-- Oops... The output is on the other NAND.
Or what group, date, and time it was posted.
-- Alt.binaries.schematics.electronic, 270 degree zero crossing shifter, this morning at 10:31
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