Signal mixing circuit

Details Signal mixing circuit Signal mixing circuit

H - Electricity

04

H

325/73

H04H 5/00 (2006.01)

Patent

CA 1231387

ABSTRACT OF THE INVENTION A signal mixing circuit for blending two signals, such as left and right channel FM stereo signals, blends the two signals at each of two outputs in response to a variable control voltage, which acts upon a transistor network connected between the two signal paths. When the variable control voltage is determined by an amplitude detector connected in a conventional FM stereo receiver, the output signals will be blended to a greater degree when the received signal strength of the broadcast FM signal becomes weaker. In a further embodiment, capacitors are added to inhibit high-frequency components of one channel and to add in high-frequency components of another channel thereby eliminating and canceling the noise components normally present in the respective signals and improving the S/N ratio.

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