There are three basic types of logarithmic amplifiers,
    Detector-Log Video Amplifiers (DLVAs)
    Successive Detection Logarithmic
    Amplifiers True Log Amplifiers (TLAs)

A detector log video amplifier (DLVA) is a type of logarithmic amplifier in which the envelope of the input RF signal is detected by a standard "linear" diode detector. The output of the detector is compressed in the video amplifier section, making input/output relationship similar to a logarithmic conversion. In general, the DLVA offers the advantage of operating over the widest frequency range, but at the sacrifice of dynamic range.
   
Features
    Advanced Microwave Hybrid Integrated
    Circuits Technology
    Frequency Range from 0.5 to 18GHz
    Superior Log Linearity
    Wide Dynamic Range
    Wide Bandwidth
    Low Current Consumption
    DC-Coupled DLVAs
    High Performance
    High Reliability
    High Repeatability
    Compact Size And Light Weight
    Custom Design Available
   
Applications
    Radar Systems
    Navigation Systems
    Laboratory Measurement And Test Equipment
    Telecommunications And Data Communications
    Military And Instrumentation Systems
    Other Commercial Applications