Balanced reflection transformer
Patent 5551074 Issued on August 27, 1996. Estimated Expiration Date: 
January 19, 2015. 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.
January 19, 2015. 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 References 3700928 Transistor amplifier variable matching transformer apparatus Programmable two-port microwave network High frequency broad-band mixing circuit including an electrolytic capacitor in parallel with a local oscillator input port High level wide band RF mixer Transmission line transformer with DC isolation Double-balanced high level wide band RF mixer Patent #: 5280648 InventorApplicationNo. 376126 filed on 01/19/1995US Classes:455/326, With balanced mixer327/113, Frequency or repetition rate conversion or control333/24R, COUPLING NETWORKS333/245, LONG LINE ELEMENTS AND COMPONENTS455/333Transistor or integrated circuitExaminersPrimary: Urban, Edward F.Attorney, Agent or FirmInternational ClassH04B 001/26AbstractA mixer comprising four FET transistors in a MMIC, a reflection transformer having tri-filar windings, an IF balun, an RF balun, a local oscillator balun, a pair of load resistors, a pair of series resistors, and a pair of series capacitors. The mixer is packaged in a lidded header similar to a large TO-8 metal package.Field of SearchWith specified local oscillator structure or couplingWith particular coupling Particular frequency conversion structure or circuitry With balanced mixer Stripline With transformer structure With transformer structure With transformer structure COUPLING NETWORKS Using transformer coil Using coupled windings LONG LINE ELEMENTS AND COMPONENTS Frequency or repetition rate conversion or control | |
