Double super-heterodyne tuner

Double superheterodyne receiver

Double superheterodyne receiver with independent frequency calib

Double superheterodyne tuner

Double superheterodyne tuner

Double superheterodyne tuner for receiving television aural sign

Double superheterodyne type receiving circuit

Double up-conversion modulator

Double-balanced high level wide band RF mixer

Double-balanced mixer

Double-balanced mixer

Double-balanced mixer circuit

Double-balanced mixer with triple-layer film transformers

Double-balanced monolithic microwave integrated circuit mixer

Double-conversion television tuner using a Delta-Sigma...

Double-converting FM tuner

Double-sideband, suppressed-carrier, signal injection apparatus

Double-tuned circuit

Doubly balanced diode mixer comprising a ring modulator each leg

Doubly balanced superconductive mixer network