A monolithic IC for decibel-linear noise reduction
Hiroshi Yamada, Masayuki Katakura · 1977
LEVEL COMPRESSION-EXPANSION systems (compandors), are widely used for reducing noise in signal transmission’ 32. However, the IC realization of the log linear transformation system has been considered difficult due to the requirement for high performance PNP transistors in these circuits. A system which incorporates an equivalent PNP transistor with high performance characteristics will be described