Bob Pease designs an adjustable slew-rate amplifier

December 29, 2008

Electronic Design has the usual great Bob Pease article. This time Bob comes up with a neat circuit to make an amplifier exhibit a different slew rate, including dealing with different rising and falling rates. Bob also seems to agree with me that using 800 MHz current-feedback amplifiers for audio is not really sensible. I will take a lower 1/f corner any day. For that you can go to many Analog Devices parts or National Semi has the LMP7732 with a 1/f corner of 3 Hz.

Posted by Paul Rako on December 29, 2008 | Comments (2)

March 29, 2010

In response to: Bob Pease designs an adjustable slew-rate amplifier
Andy T commented:

Phase response for crisp imaging is just as important as flatness of gain and slew rate, IMO, but with you being an "analog guy", maybe monoaural is considered "purist" in which case phase doesn't matter so much. I think the bandwidth rule of thumb keeps phase response in mind, not just slew rate. Maybe you can fix some of it with oxygen free Litz wire and gold plated connectors..... In any case, I am not sure I can hear all this stuff critically like I used to - too much time on the motorcycle....same goes double for you, Mr Harley Nopipes.

March 29, 2010

In response to: Bob Pease designs an adjustable slew-rate amplifier
Salt Lake City life insurance commented:

Ah! This is awesome! Thanks for countering severalsome misunderstandings I had read regarding this as of late.

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