Flame scanner having non-linear amplifier with temperature compensation
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United States of America Patent
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Mar 23, 2021
Grant Date -
Aug 15, 2019
app pub date -
Oct 18, 2017
filing date -
Oct 18, 2016
priority date (Note) -
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status (Latency Note)
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Abstract
An amplifier assembly (100) includes an amplifier (102) having an input terminal, an output terminal and a feedback terminal; a first feedback path connecting the output terminal to the feedback terminal; a second feedback path connecting the output terminal to the feedback terminal; a switch (124) positioned in the second feedback path, the switch (124) opening or closing in response to a voltage at the output terminal relative to a breakpoint, when the switch (124) is open, the amplifier assembly (100) has a first gain and when the switch (124) is closed, the amplifier assembly (100) has a second gain; and a thermally variable element (152) connected to the switch (124), the thermally variable element (152) configured to generate a compensation voltage to maintain the breakpoint in response to varying temperature of the switch (152).
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