Frequency converter for a television signal
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United States of America Patent
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Dec 23, 2008
Grant Date -
N/A
app pub date -
Jun 4, 1999
filing date -
Jun 6, 1998
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A frequency converter for converting an intermediate-frequency television signal (s2) to a low frequency by means of a mixer (4) which is fed at its radio-frequency signal input (4.1) with the intermediate-frequency television signal (s2) via an intermediate-frequency filter (3) and at its local-oscillator-signal input (4.2) with a local-oscillator signal (u), the frequency of the local-oscillator signal (u) lying in the range of an adjacent picture carrier (NBT) which is defined by the channel spacing (k.sub.0; k.sub.0*) and the respective television standard, and which after the frequency conversion is suppressed as a converted adjacent picture carrier (NBT*), or at least attenuated to a negligible residual amplitude, by means of a high-pass selectivity skirt (HP) of a filter device (5).
First Claim
Family
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Cited Art Landscape
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