Method and circuit for balancing an error signal
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United States of America Patent
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Oct 10, 1995
Grant Date -
N/A
app pub date -
Feb 8, 1994
filing date -
Aug 19, 1991
priority date (Note) -
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Abstract
A circuit for balancing an error signal delivered by an apparatus. When the apparatus is switched on initially, the error signal may be large and thereafter change only slowly with time. The error signal may be a signal which is delivered by a measuring sensor and which is independent of the quantity to be measured. The circuit includes a negative feedback loop 7, 11 which, immediately upon activating or starting the apparatus, feeds back a balancing signal which rapidly compensates the error signal. The circuit also includes components 12-16 for changing the feedback loop when the error signal has been substantially compensated, so that only slow changes in the error signal with a frequency below a selected upper limit frequency are fed back.
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