Wave transmission lines and networks – Coupling networks – Frequency domain filters utilizing only lumped parameters
Reexamination Certificate
2005-09-27
2005-09-27
Ham, Seungsook (Department: 2817)
Wave transmission lines and networks
Coupling networks
Frequency domain filters utilizing only lumped parameters
C333S172000
Reexamination Certificate
active
06949988
ABSTRACT:
A constant impedance filter maintains a constant input impedance for frequencies that are both inside the filter passband and outside the filter passband. The constant input impedance appears as a pure resistance. The constant impedance filter includes a plurality of filter poles that are connected in series. Each of the filter poles include an inductor, a capacitor, and a resistor. The value of the inductor, the capacitor, and the resistor are selected to provide a constant input impedance over frequency for each pole of the filter, which produces a constant input impedance for the entire filter over frequency. The constant impedance filter can be implemented as a low pass filter, a high pass filter, or a bandpass filter. Furthermore, the constant impedance filter can be implemented in a single-ended configuration or a differential configuration.
REFERENCES:
patent: 1615252 (1927-01-01), Zobel
patent: 2041098 (1936-05-01), Whittle
patent: 2076248 (1937-04-01), Norton
patent: 2081350 (1937-05-01), Blau
patent: 2594019 (1952-04-01), Holman
patent: 3836863 (1974-09-01), Seidel
patent: 4003005 (1977-01-01), Mukherjee et al.
patent: 4612571 (1986-09-01), Moon
patent: 4794353 (1988-12-01), Broyde
patent: 5491367 (1996-02-01), Schinzel
patent: 0 977 408 (2000-02-01), None
patent: 04186910 (1992-07-01), None
patent: 9 8583 (1997-01-01), None
International Search Report issued in PCT/US01/43037, dated Jul. 25, 2002.
Broadcom Corporation
Ham Seungsook
Sterne Kessler Goldstein & Fox P.L.L.C.
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