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previous: Jered I'm no guru or veteran, but just r... -- 3/3/2000 11:08 AM

Re: no subject

3/4/2000 2:04 AM
Jim	Re: no subject Here's the story, my friend. The output z of an op-amp is indeed very low. But, you ask, why can't it drive a low resistance load? Because when it is called upon to drive a low ohm load, the current required to get the voltage swing is much higher than in normal use. This causes the current-limit protection circuitry in the op-amp output stage to kick in and reduce the current drive and thereby the output level. Most op-amps are rated for 2k minimum but a few can drive lower ones. (One of the gurus wrote and told me this) J2K

3/4/2000 2:04 AM

Jim

Re: no subject

Here's the story, my friend. The output z of an op-amp is indeed very low. But, you ask, why can't it drive a low resistance load? Because when it is called upon to drive a low ohm load, the current required to get the voltage swing is much higher than in normal use. This causes the current-limit protection circuitry in the op-amp output stage to kick in and reduce the current drive and thereby the output level.

Most op-amps are rated for 2k minimum but a few can drive lower ones.

(One of the gurus wrote and told me this)

J2K