5 results about "Log amplifier" patented technology

A log amplifier is an amplifier for which the output voltage Vₒᵤₜ is K times the natural log of the input voltage Vᵢₙ. This can be expressed as, Vₒᵤₜ=Kln(Vᵢₙ/Vᵣₑf) where Vref is the normalization constant in volts and K is the scale factor. The logarithm amplifier gives an output voltage which is proportional to the logarithm of applied input voltage. To design a logarithm amplifier circuit, high performance op-amps like LM1458, LM771, LM714 are commonly used and a compensated logarithm amplifier may include more than one.