Input circuit of satellite tuner
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Oct 29, 2002
Grant Date -
Jul 19, 2001
app pub date -
Jan 17, 2001
filing date -
Jan 19, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A circuit that prevents a receiving signal from leaking to an LNB supply line to thereby deteriorate input VSWR characteristic includes a capacitor of about 1000 pF for removing noise and a capacitor of about 1 pF for passing a high frequency component which leaks to an LNB voltage supply line to the ground provided between the LNB voltage supply line and the ground. By the capacitor of about 1000 pF, a noise component included in the LNB voltage supply line is removed. Further, by the capacitor of about 1 pF, the high frequency signal component which leaks via a choke coil is bypassed to thereby reduce impedance of a node NA over a broad band and prevent a reflecting wave from being produced at the node NA and input VSWR from being deteriorated.
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