Frequency converting cable network signal transmission devices
AssigneePpc Broadband, Inc.
InventorDavid A. Barany
Life of this patent
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Abstract
A network communication device includes a first output port, a second output port, and a converting circuit. The first output port may be in communication with an input port and may be configured to receive a first reduced-power version of the signal received at an input port. The converting circuit may be configured to receive a second reduced-power version of the signal, down-convert a high-frequency portion thereof, and produce a down-converted signal. The first and the second reduced-power versions of the signals are in the same frequency band. The second output port receives at least a portion of the down-converted signal such that the high frequency portion of the second reduced power version of the signal is attenuated before the signal is transmitted to a subscriber device.
Claims17
A network communication device for down-converting a portion of a signal to a lower frequency for use by a subscriber device, comprising:
- a converting circuit configured to separate an input signal into a high-frequency portion, a low-frequency portion, and a middle-frequency portion, attenuate the middle frequency portion, and down-convert the high-frequency portion to a down-converted middle-frequency portion;
- and
- wherein the network communication device is configured to output the down-converted middle-frequency portion of the signal to the subscriber device so as to enable use of high frequency signals with pre-existing subscriber equipment;
- wherein the converting circuit comprises a first filter having a high-pass filter, a band-pass filter, and a low-pass filter, wherein the band-pass filter is terminated to a ground;
- further comprising a second filter having a high-pass filter and a low-pass filter, wherein the low-pass filter of the second filter is coupled to the low-pass filter of the first filter;
- and
- wherein the converting circuit further includes a mixer and an oscillator in communication with the mixer, the mixer being in communication with the high-pass filter of the first filter and the high-pass filter of the second filter, such that downstream signals pass from the high-pass filter of the first filter to the high-pass filter of the second filter via the mixer, wherein the mixer and the oscillator are configured to down-convert the signals received at the mixer from a high-frequency range to a medium-frequency range.
A network communication device for down-converting a portion of a signal to a lower frequency for use by a subscriber device, comprising:
- a first output port configured to receive a first reduced-power version of a signal received at an input port;
- a converting circuit configured to receive a second reduced-power version of the signal, separate the second reduced-power version of the signal into a high-frequency portion, a low-frequency portion, and a middle-frequency portion, attenuate the middle-frequency portion, down-convert the high-frequency portion to a down-converted middle-frequency portion, and combine the low-frequency portion and the down-converted middle-frequency portion after down-converting the high-frequency portion to produce a down-converted signal;
- and
- wherein the down-converted signal is configured to be output to the subscriber device so as to enable use of high frequency signals with pre-existing subscriber equipment.
A network communication device for down-converting a portion of a signal to a lower frequency portion for use by a subscriber device, comprising:
- a first output port in communication with an input port and configured to receive a first reduced-power version of the signal received at an input port;
- a second output port;
- a converting circuit configured to receive a second reduced power version of the signal, separate out the second reduced power version of the signal into a high-frequency portion, a low-frequency portion, and a middle-frequency portion, and down-convert the high-frequency portion of the signal to produce a down-converted signal;
- and
- wherein the down-converted signal is configured to be output to the subscriber device so as to enable use of high frequency signals with pre-existing subscriber equipment.
Dependencies are inferred from the claim text.