Telecommunications – Receiver or analog modulated signal frequency converter – With particular receiver circuit
Reexamination Certificate
2007-05-15
2007-05-15
Nguyen, Tony T. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
With particular receiver circuit
C455S067130, C455S296000, C363S097000, C363S131000
Reexamination Certificate
active
10197486
ABSTRACT:
A high impedance circuit of the present invention includes an LC parallel resonance circuit for raising circuit impedance, and a diode, which is connected in parallel to the LC parallel resonance circuit, causing a loop current to flow back via the diode and an inductor in the LC parallel resonance circuit so that a counter electromotive force, due to a surge voltage, which occurs across the inductor is cancelled. A low noise block downconverter which includes a high impedance circuit having a high impedance prevents peripheral circuits from being destroyed by a counter electromotive force, due to a surge voltage, which occurs across the inductor. For this, a diode is provided to cause a loop current to flow back via the diode and the inductor so that the counter electromotive force is cancelled. This makes it possible to cancel the counter electromotive force, to lower the voltage across the inductor to a forward voltage of the diode, and to prevent the destruction of the peripheral circuits such as the high impedance circuit.
REFERENCES:
patent: 4112337 (1978-09-01), Nagasaki et al.
patent: 4540956 (1985-09-01), Chauvin et al.
patent: 4654645 (1987-03-01), Yamagishi
patent: 4989264 (1991-01-01), Ohto
patent: 5206954 (1993-04-01), Inoue et al.
patent: 5208547 (1993-05-01), Schindler
patent: 5534825 (1996-07-01), Goma et al.
patent: 5539359 (1996-07-01), Goma
patent: 5598324 (1997-01-01), Imamura et al.
patent: 5649311 (1997-07-01), Somei
patent: 5959592 (1999-09-01), Petruzzelli
patent: 6081168 (2000-06-01), Park
patent: 6157269 (2000-12-01), Orr
patent: 6411170 (2002-06-01), Hino
patent: 6462716 (2002-10-01), Kushihi
patent: 61-247131 (1986-11-01), None
patent: 03-73046 (1991-07-01), None
patent: 5-90500 (1993-04-01), None
patent: 07-074665 (1995-03-01), None
patent: 9-266626 (1997-10-01), None
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