Telecommunications – Receiver or analog modulated signal frequency converter – Frequency modifying or conversion
Patent
1993-06-14
1995-04-25
Kuntz, Curtis
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency modifying or conversion
455302, 455333, 327113, H04B 126
Patent
active
054107431
ABSTRACT:
A mixer separates IF components IF1, IF2 of the same frequency which are images of different frequency RF signals RF1, RF2 beating with a given LO signal. The LO signal is applied to a FET active power divider and applied to the drains of a pair of balanced FET mixing elements. The FETs for the active power divider are built from the same device structure as the FETs for the mixing elements sharing drain nodes. The RF signals are passed through a quadrature phase shifter and applied to the gates of the FET mixing elements. The mixed signals appear at the drains of FET mixing elements are applied to opposing ports of a second quadrature hybrid at whose output ports the separated IF output signals IF1, IF2 appear.
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Golio John M.
Seely Warren L.
Staudinger Joseph
Handy Robert M.
Kuntz Curtis
Lin Mary M.
Motorola Inc.
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