The principle of the construction of a logarithmic amplifier using semi-conductor Germanium diodes as logarithmic elements was described in Report B-056, Serial No. 1953/14. This report describes ...

This report describes a compact logarithmic amplifier using a semi-conductor as the logarithmic element. Very high writing speeds are obtainable with this instrument, which may therefore be used ...

The circuit shown is a differential amplifier that not only offers programmability but also provides a logarithmic-type gain (Fig. 1). The traditional gain-setting resistors of the amplifier ...