Balanced dual output mixer circuit

Details Balanced dual output mixer circuit Balanced dual output mixer circuit

1975-11-06

1976-11-16

Kominski, John

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

325487, 329204, 329166, 329167, H03D 110

Patent

active

039926745

ABSTRACT:
An improved balanced dual output diode mixer circuit having separate output terminals for audio and RF output signals is disclosed. The mixer circuit includes a first transformer having a primary and a center tapped secondary winding. The ends of the secondary winding are coupled to end terminals of two separate secondary windings of a second transformer through a switching circuit which comprises four diodes. RF bypass capacitors are coupled between an RF terminal and end terminals of the secondary windings of the second transformer and provide a low RF and a high audio impedance therebetween. RF chokes are coupled between audio output terminals and the RF bypass capacitors and provide a low impedance audio path which is connected at a point of low RF impedance. A pair of resistors coupled between ground and the RF bypass capacitors provide a DC current path to ground for the rectified DC current created by the switching network. The primary winding of the second transformer is coupled to RF output terminals. The balanced dual output diode mixer is adaptable for providing both audio and RF output signals when RF signals are applied directly to the primary winding of the first transformer and through the RF bypass capacitors to the secondary windings of the second transformer.

REFERENCES:
patent: 2881312 (1959-04-01), Ressler

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