Instantaneous floating point amplifier
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United States of America Patent
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-
Nov 3, 1987
Grant Date -
N/A
app pub date -
Jun 25, 1986
filing date -
Jun 25, 1986
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An improved instantaneous floating point (IFP) amplifier is provided having a plurality of cascaded amplifier stages, with each stage having a plurality of possible gains. The input sample signal is passed through each stage so that no stage is selectively bypassed. A bipolar, logarithmic amplifier is used for gain control. The gain control bits correspond to the industry standard gain control codes, thereby eliminating the need for bit mapping. The offset voltage control circuit is initialized during power-up by removing the IFP input signal and measuring the input referred offset at each gain setting. The measurements are stored. When a sample signal is received at the IFP amplifier input, the appropriate gain is applied to that signal along with the stored offset value corresponding to that gain.
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