Patent
High-speed bipolar logarithmic analog-to-digital converter
TLDR
In this paper, a high-speed bipolar logarithmic analog-to-digital (A/D) converter outputs signed binary numbers proportional to the signed binary number of a bipolar analog input signal.Abstract:
A high-speed bipolar logarithmic analog-to-digital (A/D) converter outputs signed binary number proportional to the logarithm of a bipolar analog input signal. A log converter is followed by a level shifting amplifier to center the output of the log converter on a temperature compensating reference. The reference voltage from the temperature compensating reference is used by a linear A/D converter to set the end points of the converter range. A code converter follows the A/D converter if a uniform absolute value coding is desired. Limiting the number of least significant bits (LSB) used to those representing the range of usable converter operation completes the device.read more
Citations
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Patent
Method and apparatus for signal companding
TL;DR: In this paper, a method and apparatus for signal companding is disclosed that incorporates a log-offset companding technique to provide both a high bandwidth over the dynamic range of the signal being processed as well as temperature stability.
Patent
Temperature compensation of logarithmic amplifiers in a sampled data system
TL;DR: In this paper, the authors provide compensation for temperature effects intrinsic to a logging transistor in a logarithmic amplifier by applying a temperature-dependent term to a voltage reference of an analog-to-digital converter.
References
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Patent
Digital-to-analog converter with current source transistors operated accurately at different current densities
TL;DR: In this article, a digital-to-analog converter of the type formed with a plurality of current source transistors arranged to carry different levels of current according to a predetermined weighting pattern is presented.
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TL;DR: In this paper, a temperature-compensated antilogarithmic converter has a temperature sensitive signal generator for generating a temperature dependent signal which varies in proportion to absolute temperature.
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TL;DR: In this article, a charge transfer circuit of the type including first and second charge storage locations and a charge-transfer transistor for transferring a plurality of discrete packets of charge from the first to the second charge-storage location is disclosed.