FM receiver that receives fm signal and method for receiving FM signal
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United States of America Patent
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Oct 4, 2016
Grant Date -
Jul 2, 2015
app pub date -
Oct 23, 2014
filing date -
Dec 27, 2013
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Abstract
A quadrature detector quadrature-detects an FM signal. An FM detector generates a detection signal by FM detecting an FM signal that has been quadrature-detected. An AFC unit generates a control signal for controlling a frequency of a local oscillation signal used for quadrature detection on the basis of the generated detection signal, and feeds back the control signal to a local oscillator that should output the local oscillation signal. A difference calculator generates a difference signal representing a difference from a reference value on the basis of the generated detection signal. An addition unit adds the generated difference signal and the generated detection signal.
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