Double-balanced high level wide band RF mixer
August 16, 2011. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesIntegrated circuit for frequency conversion Radio frequency mixer Mixer circuit for use in a tuner of a television set or the like High frequency broad-band mixing circuit including an electrolytic capacitor in parallel with a local oscillator input port High level wide band RF mixer Monolithic double balanced mixer with high third order intercept point employing an active distributed balun Patent #: 5060298 InventorAssigneeApplicationNo. 746387 filed on 08/16/1991US Classes:455/326, With balanced mixer327/105, Synthesizer333/25, Balanced to unbalanced circuits333/119, Using transformer coil455/333Transistor or integrated circuitExaminersPrimary: Eisenzopf, Reinhard J.Assistant: Faile, Andrew Foreign Patent References
International ClassH04B 001/26AbstractA double-balanced wide band RF mixer includes a first bifilar balun transformer coupling a high level source of RF signal to the primary windings of a pair of trifilar balun transformers. The two output windings of each trifilar transformer are connected in series with the drain-source circuits of a pair of FET transistors which are alternately activated by a symmetric local oscillator signal. An IF signal with reduced second order products of the RF signal is developed between the output windings of the two trifilar balun transformers.Other References
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