Wide band tuner

Details Wide band tuner Wide band tuner

2006-03-14

2006-03-14

Barnie, Rexford (Department: 2643)

Telecommunications

Receiver or analog modulated signal frequency converter

With particular receiver circuit

C348S731000, C455S173100, C455S197300, C455S339000, C455S209000

Reexamination Certificate

active

07013124

ABSTRACT:
When changeover switch (26) selects the output of L band filter (23), changeover switch (28) is turned off and mixer (29) is operated as an amplifier such that the oscillation frequency of local oscillator (31) is controlled based on data fed to data terminal (37) and a channel selection can be performed in mixer (32). When changeover switch (26) selects the output of V band filter (25), changeover switch (28) is turned on and a channel selection is performed based on data fed to data terminal (37) in mixer (29). With this arrangement, the need for a tuning filter is eliminated and a broadband tuner not requiring manpower for adjustments can be provided.

REFERENCES:
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International Search Report corresponding to application No. PCT/JP02/03466 dated Jul. 16, 2002.
English translation of Form PCT/ISA/210.

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