High-Speed Bipolar Logarithmic Analog-to-Digital Converter.
Patent, Filed 11 Oct 83, patented 16 Jul 85,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A high-speed bipolar logarithmic analog-to-digital AD converter outputs a 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 AD converter to set the end points of the converter range. A code converter follows the AD converter if a uniform abslute value coding is desired. Limiting the number of least significant bits LSB used to those representing the range of u sable converter operation completes the device. Patent
- Electrical and Electronic Equipment