H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/73
H04B 1/16 (2006.01)
Patent
CA 1280467
ABSTRACT OF THE DISCLOSURE In an AM stereo receiving apparatus for decoding an AM stereo broadcasting signal of an ISB system, an envelope detecting circuit detects an output of an intermediate frequency amplifying circuit and a DC removing circuit removes a DC component therefrom, so that a stereo sum signal (L + R) is obtained. A quadrature detecting circuit detects quadrature of the output of the intermediate frequency amplifying circuit. A multiplying circuit multiplies the stereo sum signal (L + R), which is amplified a times as much by a first amplifying circuit, and the output of the quadrature detecting circuit. An addition circuit adds the output of the quadrature detecting circuit, which is amplified b times as much by a second amplifying circuit, and the output of the multiplying circuit. The output of the addition circuit becomes a stereo difference signal (L - R) by appropriately setting the amplification factor a of the first amplifying circuit and the amplification factor b of the second amplifying circuit.
525578
Arai Masashi
Tanaka Kanji
G. Ronald Bell & Associates
Sanyo Electric Co. Ltd.
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