AnsweredAssumed Answered

True Logarithmic Amplifier

Question asked by on Sep 21, 2011
Latest reply on Sep 21, 2011 by jdobler


I have an application for a "baseband" logarithmic amplifier from DC to 250 MHz to compress signals before digital conversion. I understand how the demodulating log amps work and devices such as the AD8310 won't work. However, the AD641 brings the output of the 5 amplifier limiter stages out of the chip. Could these (differential) outputs be used for a baseband log amp? I.E. is this output the instantaneous logarithm of the input voltage?

Thank you

Daniel Law