H - Electricity – 03 – D
Patent
H - Electricity
03
D
329/2, 325/73
H03D 1/00 (2006.01) H04H 5/00 (2006.01)
Patent
CA 1174737
ABSTRACT OF THE DISCLOSURE A stereo demodulating circuit for an AM stereo receiver includes an IF stage for producing an IF signal from a received AM stereo signal of the type having a carrier amplitude-modulated with the sum of left and right channel signals and the carrier phase-modulated with the difference of the left and right channel signals; an envelope detector for producing a sum signal corresponding to the sum of the left and right channel signals in response to the IF signal, and having level information, amplitude-modulation information and a DC component; a negative peak limiter for limiting the minimum level of the sum signal from the envelope detector; a divider for dividing the IF signal by the sum signal with its minimum level limited to produce a phase-modulation signal; a phase-locked loop for producing a non-modulation signal from the IF signal; a low-pass filter for removing the amplitude-modulation information from the sum signal from the envelope detector to produce a level information signal having only the level information; a second negative peak limiter for limiting the minimum level of the level information signal; multiplier for multiplying the level information signal with its minimum level limited, the non-modulation signal and the phase-modulation signal to produce a difference signal; and a matrix from reproducing the left and right channel signals in response to the sum signal with its DC component removed and the difference signal with a carrier component thereof removed.
399820
Gowling Lafleur Henderson Llp
Sony Corporation
LandOfFree
Apparatus for demodulating an am stereophonic signal does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus for demodulating an am stereophonic signal, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus for demodulating an am stereophonic signal will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1193041