Quasi-double balanced dual-transformer dual FET mixer, which achieves better isolation by using a first and second diplexer, and a transmission line RF balun
December 20, 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 3577206 3700928 Transistor amplifier variable matching transformer apparatus Programmable two-port microwave network Monolithic microwave integrated circuit broadband mixer 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 Transmission line transformer with DC isolation Double-balanced high level wide band RF mixer InventorApplicationNo. 575293 filed on 12/20/1995US Classes:455/333, Transistor or integrated circuit455/323, Particular frequency conversion structure or circuitry455/326With balanced mixerExaminersPrimary: Chin, Tommy P.Assistant: Vincent, David Attorney, Agent or FirmInternational ClassesH04B 001/28H04B 001/26 AbstractA double balanced dual-quad transformer dual field effect transistor (FET) mixer is disclosed using a first and second (FET) which have their gates electrically connected together, such that the first and second FET are connected in series. The mixer achieves improved isolation by using a first and second diplexer, and an RF and IF coupling network which comprises a flux-coupled IF transformer and a transmission line RF balun.Field of SearchFrequency modifying or conversionParticular frequency conversion structure or circuitry With balanced mixer Stripline Push-pull Transistor or integrated circuit Frequency or repetition rate conversion or control Product Balanced to unbalanced circuits Having long line elements For providing frequency separation For providing frequency separation For providing frequency separation Utilizing long line element Including switching means | |
