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US 4,712,024 AGranted
Active balum star mixer
AssigneeSperry Corporation
InventorsCharles F. McGuire, David J. Weber, Gordon C. Steyaert
Life of this patent
Estimating the term…
Abstract
A mixer circuit wherein transistors are used to drive Schottky diodes in a star configuration in order to avoid the disadvantages of transformer coupling.
Claims13
A mixer circuit comprising,
- first and second diodes having a respective cathode thereof connected together,
- third and fourth diodes having a respective anode thereof connected together and to the cathodes of said first and second diodes at a common junction to provide an output terminal,
- first source means connected to each respective anode of said first and second diodes,
- second source means connected to each respective cathode of said third and fourth diodes,
- first transistor means having its emitter-collector conduction path connected between the anode of said first diode and the cathode of said fourth diode,
- second transistor means having its emitter-collector conduction path connected between the anode of said first diode and the cathode of said third diode,
- third transistor means having its emitter-collector conduction path connected between the anode of said second diode and the cathode of said fourth diode,
- fourth transistor means having its emitter-collector conduction path connected between the anode of said second diode and the cathode of said third diode,
- first input means supplying switching signals to the control electrode of each of said second and third transistor means, and
- second input means supplying oscillator signals to the control electrode of each of said first and fourth transistor means.
7 more elements
Dependencies are inferred from the claim text.