Double-balanced high level wide band RF mixer

Details Double-balanced high level wide band RF mixer Double-balanced high level wide band RF mixer

1991-08-16

1994-01-18

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455333, 333 25, 333119, 307529, H04B 126

Patent

active

052806480

ABSTRACT:
A 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.

REFERENCES:
patent: 4216431 (1980-08-01), Shibata et al.
patent: 4823400 (1989-04-01), Dobrovolny
patent: 4912520 (1990-03-01), Yamamoto et al.
patent: 4979233 (1990-12-01), Kawahata
patent: 5027163 (1991-06-01), Dobrovolny
patent: 5060298 (1991-10-01), Waugh et al.
"High Dynamic Range Mixing"; Oxner, Ed Ham Radio Mar. 1988; pp. 10-12 and 14.
"A GaAs MESFET Mixer with Very Low Intermodulation" Maas, Stephen; IEEE Transactions on Microwave Theory; vol. MTT-35 No. 4; Apr. 1987.
"A Commutation Double-Balanced MOSFET Mixer of High Dynamic Range"; Oxner, Ed; Siliconix; Jan. 1986, pp. 5-14.
Oxner, Ed "FETS in Balanced Mixers" Siliconix Application Note, 1972, pp. 1-15.
Oxner, Ed "Junction FET's in Active Double-Balanced Mixers", Siliconix Application Notes, 1973 pp. 1-2.

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