Humbucking pair building block circuit for vibrational sensors
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United States of America Patent
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Aug 10, 2021
Grant Date -
Nov 19, 2020
app pub date -
Aug 5, 2020
filing date -
Jul 23, 2014
priority date (Note) -
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Abstract
This invention eliminates most mechanical switching in vibrational pickup circuits by using variable gains to combine signals of sensors in differential amplifiers as J−1 humbucking pairs for J>1 number of sensors, with the sensors matched to produce the same level and phase of unwanted hum from external sources. It can also combine J>1 number of matched sensors with K>1 number of dissimilar sensors which are matched only to each other in the same manner. This produces not only all the possible mechanically switched humbucking signals, but all the continuously-varying combinations of humbucking signals in between.
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