Low voltage, simplified and temperature compensated logarithmic detector

摘要

An electronic circuit with a logarithmic detector performs the following operations: receiving an input voltage, generating a series of subsequently amplified versions of the input voltage, rectifying the versions, thereupon rescaling and converting the versions into currents, summing the currents and applying the summed current to a resistor. With regard to the prior art the order of rectification and rescaling has been interchanged. As a result, the design is simplified, the circuit's supply voltage is lower than that of the prior art, and the circuit is more accurate and easier to compensate for temperature dependence.