Assertion: receiver's circuit | /r/AtLocation | each radio amplification stage
Facets:
value: to cancel the feedback
type: PURPOSE
Source sentences:
text: The Neutrodyne receiver, invented in 1922 by Louis Hazeltine, was a TRF receiver with a "neutralizing" circuit added to each radio amplification stage to cancel the feedback to prevent the oscillations which caused the annoying whistles in the TRF.