Telecommunications – Receiver or analog modulated signal frequency converter – Plural receivers
Patent
1995-06-14
1997-05-13
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Plural receivers
455137, 455140, 4551881, 4552771, H04B 708
Patent
active
056302134
ABSTRACT:
A radio frequency (RF) antenna switch (136) and associated method of operating the same is provided for switching between a first antenna (109) and a second antenna (111). A first mixer (125) has an input terminal 124 coupled to the first antenna (109) and has an output terminal 126. A second mixer (129) has an input terminal 128 coupled to the second antenna (111) and has an output terminal 130 coupled to the output terminal of the first mixer (125). The first mixer (125) and the second mixer (129) are alternatively enabled responsive to the state of an antenna select signal (141). Additionally, the common output terminals 126 and 130 of both the first mixer (125) and the second mixer (129) are matched to a first intermediate frequency stage (131). The RF antenna switch (136) advantageously provides low loss and low current drain.
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Eisenzopf Reinhard J.
Kaschke Kevin D.
Le Thanh
Motorola Inc.
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