Laser Rangefinder receiver preamplifier
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United States of America Patent
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-
Jul 3, 1990
Grant Date -
N/A
app pub date -
Dec 27, 1988
filing date -
Dec 27, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A preamplifier for a laser rangefinder receiver having two signal level modes comprises, in accordance with this invention, a light detector having a first load resistor, and a buffer having an input connected across the load resistor and an output to the receiver. A first diode is placed in series with a second diode, with the second diode being connected in parallel with a second load resistor. A positive feedback path is provided from the output to the junction of the first and second diodes, wherein the first and second diodes are nonconductive during a low signal level mode, and conductive during a high signal level mode.
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