Logarithmic converters

1 November 1969

journal article
Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Spectrum

Vol. 6 (11) , 69-72
https://doi.org/10.1109/mspec.1969.5214172

Abstract

Logarithmic converters have an important place in signal processing and the bipolar transistor can be an invaluable element for generating such functions. As with most any design, there are tradeoffs. With logarithmic converters composed of bipolar transistors, response time must be weighted against dynamic range. Several basic circuits for log and antilog generators, with differently weighted operating characteristics, are analyzed and, applications are described.

Keywords

DYNAMIC RANGE
RESISTORS
SIGNAL GENERATORS
BIPOLAR TRANSISTORS
OPERATIONAL AMPLIFIERS
SIGNAL PROCESSING
CIRCUITS
DYNAMIC VOLTAGE SCALING
TEMPERATURE DISTRIBUTION
NEGATIVE FEEDBACK

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