Patent ID: 6636099
Filing Date: 2003-10-21
Classification: G06G

Abstract:
A voltage mode logarithmic amplifier for producing a decibel scaled output voltage signal, comprising:a first gain stage for providing at least one amplified rectified voltage signal responsive to at least one input voltage signal; a second gain stage for providing at least one further amplified rectified signal responsive to said at least one input voltage signal and said at least one amplified rectified signal; and an output node for producing at least one output voltage signal that is responsive to said at least one amplified rectified voltage signal and said at least one further amplified rectified voltage signal wherein said at least one output voltage signal includes at least one combination of said at least one amplified rectified voltage signal and said at least one further amplified rectified voltage signal, and wherein said at least one combination of said at least one amplified rectified voltage signal and said at least one further amplified rectified voltage signal output voltage signal includes an average of said at least one amplified rectified voltage signal and said at least one further amplified rectified voltage signal, and wherein said average is obtained through a plurality of resistors coupled to the first and second gain stages.