US 11,716,443 B2
LC filtering with auto tuning
Marcel Franz Christian Schemmann, Maria Hoop (NL); Zoran Maricevic, West Hartford, CT (US); Zhijian Sun, Avon, CT (US); and Eric Joseph Cormier, Bristol, CT (US)
Assigned to ARRIS Enterprises LLC, Suwanee, GA (US)
Filed by ARRIS Enterprises LLC, Suwanee, GA (US)
Filed on Mar. 22, 2021, as Appl. No. 17/208,718.
Claims priority of provisional application 62/993,261, filed on Mar. 23, 2020.
Prior Publication US 2022/0303496 A1, Sep. 22, 2022
Int. Cl. H04N 7/10 (2006.01); H04B 1/18 (2006.01); H04H 60/96 (2008.01); H03F 1/56 (2006.01); H03F 1/32 (2006.01)
CPC H04N 7/102 (2013.01) [H03F 1/32 (2013.01); H03F 1/565 (2013.01); H04B 1/18 (2013.01); H04H 60/96 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A radio-frequency amplifier for a cable network comprising:
(a) a forward amplifier configured to amplify a high frequency range of signals that are provided downstream to a cable receiver of said cable network;
(b) a return amplifier configured to amplify a low frequency range of signals that are provided upstream to a head end of said cable network;
(c) an out-of-band forward amplifier configured to amplify a digitally protected video signal having a frequency in a range between 70 MHz and 130 MHz that are provided downstream to said cable receiver of said cable network;
(d) a notch filter configured to reject said amplified said digitally protected video signal having said frequency in said range between 70 MHz and 130 MHz from being amplified by said return amplifier;
(e) said radio-frequency amplifier providing said high frequency range of signals together with said amplified digitally protected video signal to said cable receiver; and
(f) said radio-frequency amplifier providing said low frequency range of signals without said frequencies rejected by said notch filter to said head end of said cable network, wherein said notch filter has a rejection range of no more than 24 MHz wide with at least 50 dB rejection for said digitally protected video signal.