CATV device with resistive signal distribution network
The present invention is directed to a CATV & MoCA® device, such as a RF signal amplifier. The RF signal amplifier includes a RF input port to receive signals from, and transmit signals to, a service provider. The RF input port is connected to an active communication path with a downstream signal amplifier leading to an input of a resistive splitter network. The resistive splitter network has plural interconnected resistors, which split the amplified signal received at the input of the resistive splitter network and provide the signal to plural “CATV & MoCA®” output ports. Upstream CATV signals received by the “CATV & MoCA®” output ports are combined by the resistive splitter network and sent to the RF input port to be transmitted to the service provider. MoCA® signals received by any one of the “CATV & MoCA®” output ports are carried by the resistive splitter network to the other “CATV & MoCA®” output ports, and potentially to other “MoCA® only” ports of the RF signal amplifier.
1. A CATV radio frequency (“RF”) signal amplifier comprising:
a housing;
an input port located on said housing, said input port for receiving downstream service provider signals and for transmitting upstream signals from customer devices to the service provider;
a splitter network having an input;
a plurality of first output ports located on said housing and configured as outputs of said splitter network, said plurality of first output ports for outputting service provider signals to customer devices and for receiving signals directed to the service provider, and said plurality of first output ports also for transmitting and receiving signals associated with an in-home network, allowing customer devices within the home network to communicate with each other, said plurality of first output ports functioning as “CATV and in-home network” ports; and
a full duplex amplifier including:
an upstream directional coupler having first, second and third terminals, wherein signals passing between said first and third terminals in either direction encounter a first level of attenuation, signals passing between said second and third terminals encounter a second level of attenuation greater than said first level of attenuation, and signals passing between said first and second terminals encounter a third level of attenuation greater than said second level of attenuation;
a downstream directional coupler having first, second and third terminals, wherein signals passing between said first and third terminals in either direction encounter a first level of attenuation, signals passing between said second and third terminals encounter a second level of attenuation greater than said first level of attenuation, and signals passing between said first and second terminals encounter a third level of attenuation greater than said second level of attenuation;
a first amplifier having an input connected to one of said first terminal or said second terminal of said upstream directional coupler and an output connected to one of said first terminal or said second terminal of said downstream directional coupler; and
a second amplifier having an input connected to the other of said first terminal or said second terminal of said downstream directional coupler and an output connected to the other of said first terminal or said second terminal of said upstream directional coupler, wherein said third terminal of said upstream directional coupler is considered a first input/output of said full duplex amplifier and is connected to said input port, and wherein said third terminal of said downstream directional coupler is considered a second input/output of said full duplex amplifier and is connected to said input of said splitter network.
2. The RF signal amplifier of claim 1 , further comprising:
a first filter functioning as an in-home network rejection filter and coupled between said input of said splitter network and said RF input port.
3. The RF signal amplifier of claim 2 , wherein said first filter is located in the connection between said second input/output of said full duplex amplifier and said input of said splitter network.
4. The RF signal amplifier of claim 1 , further comprising:
a plurality of second output ports located on said housing, said plurality of second output ports for transmitting and receiving in-home network signals allowing customer devices within the home network to communicate with each other, wherein said plurality of second output ports do not output service provider signals to customer devices and do not pass customer device signals to the service provider, said plurality of second output ports functioning as “in-home network only” ports;
an electrical path between said input of said splitter network and said plurality of second output ports; and
a filtering device disposed along said electrical path to limit signals traversing along said electrical path to in-home network frequencies.
5. The RF signal amplifier of claim 1 , wherein said splitter network includes only resistors.
6. The RF signal amplifier of claim 1 , wherein said splitter network includes a power divider with a ferrite core to split an incoming signal at an input leg to two output legs, and wherein said ferrite core functions to combine signals received at said two output legs and send the combined signal to said input leg.
7. The RF signal amplifier of claim 6 , further comprising:
a first plurality of resistors connected to said first output leg and connected to first and second RF output ports of said plurality of first output ports, and a second plurality of resistors connected to said second output leg and connected to third and fourth RF output ports of said plurality of first output ports.
8. The RF signal amplifier of claim 1 , wherein signal paths passing through said first and second amplifiers are considered an active communications path, and further comprising:
a passive communications path formed within said housing, wherein said passive communications path has no powered elements disposed therein, and wherein a first end of said passive communications path is connected to said input port; and
a passive output port located on said housing, which is connected to a second end of said passive communications path, opposite said first end of said passive communications path.
9. The RF signal amplifier of claim 8 , further comprising:
a first directional coupler, having first, second and third terminals, wherein signals passing between said first and third terminals in either direction encounter a first level of attenuation, signals passing between said second and third terminals encounter a second level of attenuation greater than said first level of attenuation, and signals passing between said first and second terminals encounter a third level of attenuation greater than said second level of attenuation, wherein said first terminal of said first directional coupler is connected to said first input/output of said full duplex amplifier, said second terminal of said first directional coupler is connected to said first end of said passive communication path, and said third terminal of said first directional coupler is connected to said input port.
10. The RF signal amplifier of claim 9 , further comprising:
a relay having a first terminal directly connected to said first terminal of said first directional coupler, a second terminal directly connected to said first input/output of said full duplex amplifier, and a third terminal directly connected to a grounded impedance, wherein said relay connects said first terminal to said second terminal when power is being provided to said first and second amplifiers, and said relay connects said first terminal to said third terminal when power is not being provided to said first and second amplifiers.
11. The RF signal amplifier of claim 8 , further comprising:
an electrical path between said input of said splitter network and said passive output port; and
a filtering device disposed along said electrical path to limit signals traversing along said electrical path to in-home network frequencies.
12. A CATV radio frequency (“RF”) signal amplifier comprising:
a RF input port;
a resistive splitter network having an input and a plurality of active RF output ports;
an active communications path connecting said RF input port to said input of said resistive splitter network, said active communications path including at least one power amplifier to amplify an upstream signal or a downstream signal passing along said active communications path;
a first filter functioning as an in-home network rejection filter and coupled between said input of said resistive splitter network and said RF input port;
a passive RF output port;
a passive communications path connecting said RF input port to said passive RF output port; and
an in-home network pass filter coupled between a first node and a second node, wherein said first node is located upstream of said passive RF output port along said passive communications path and said second node is located downstream of said first filter and upstream of at least one of said plurality of active RF output ports along said active communications path, said in-home network pass filter configured to pass signals in an in-home network frequency band and to not pass signals in upstream and downstream frequency bands of a service provider.
13. The RF signal amplifier of claim 12 , further comprising:
a first directional coupler, having first, second and third terminals, wherein signals passing between said first and third terminals in either direction encounter a first level of attenuation, signals passing between said second and third terminals encounter a second level of attenuation greater than said first level of attenuation, and signals passing between said first and second terminals encounter a third level of attenuation greater than said second level of attenuation, wherein said first terminal of said first directional coupler is connected to said active communications path, said second terminal of said first directional coupler is connected to said passive communication path, and said third terminal of said first directional coupler is connected to said input port.
14. The RF signal amplifier of claim 13 , further comprising:
a relay having a first terminal directly connected to said first terminal of said first directional coupler, a second terminal directly connected to said active communications path, and a third terminal directly connected to a grounded impedance, wherein said relay connects said first terminal to said second terminal when power is being provided to said at least one power amplifier, and said relay connects said first terminal to said third terminal when power is not being provided to said at least one power amplifier.
15. The RF signal amplifier of claim 12 , further comprising:
a housing;
wherein said RF input port is located on said housing, said RF input port for receiving downstream service provider signals and for transmitting upstream signals from customer devices to the service provider;
wherein said plurality of active RF output ports are first output ports located on said housing and configured as outputs of said resistive splitter network, said plurality of first output ports for outputting service provider signals to customer devices and for receiving signals directed to the service provider, and said plurality of first output ports also for transmitting and receiving signals associated with an in-home network, allowing customer devices within the home network to communicate with each other, said plurality of first output ports functioning as “CATV and in-home network” ports;
wherein said active communications path includes:
a first diplexer having a full frequency band terminal, a high frequency band terminal and a low frequency band terminal, wherein said full frequency band terminal is connected to said RF input port;
a second diplexer having a full frequency band terminal, a high frequency band terminal and a low frequency band terminal, wherein said full frequency band terminal is connected to said input of said resistive splitter network; and
wherein said at least one power amplifier includes a first amplifier having an input connected to said high frequency band terminal of said first diplexer and an output connected to said high frequency band terminal of said second diplexer.
16. The RF signal amplifier of claim 15 , wherein said at least one power amplifier further includes a second amplifier having an input connected to said low frequency band terminal of said second diplexer and an output connected to said low frequency band terminal of said first diplexer.
17. The RF signal amplifier of claim 15 , further comprising:
a plurality of second output ports located on said housing, said plurality of second output ports for transmitting and receiving in-home network signals allowing customer devices within the home network to communicate with each other, wherein said plurality of second output ports do not output service provider signals to customer devices and do not pass customer device signals to the service provider, said plurality of second output ports functioning as “in-home network only” ports;
an electrical path between said input of said resistive splitter network and said plurality of second output ports; and
wherein said in-home network pass filter is disposed along said electrical path to limit signals traversing along said electrical path to in-home network frequencies.
18. The RF signal amplifier of claim 15 , further comprising:
a first directional coupler, having first, second and third terminals, wherein signals passing between said first and third terminals in either direction encounter a first level of attenuation, signals passing between said second and third terminals encounter a second level of attenuation greater than said first level of attenuation, and signals passing between said first and second terminals encounter a third level of attenuation greater than said second level of attenuation, wherein said first terminal of said first directional coupler is connected to said active communications path, said second terminal of said first directional coupler is connected to said passive communication path, and said third terminal of said first directional coupler is connected to said RF input port.
19. A CATV radio frequency (“RF”) signal amplifier comprising:
a housing;
an input port located on said housing, said input port for receiving downstream service provider signals and for transmitting upstream signals from customer devices to the service provider;
a resistive splitter network having an input;
a plurality of first output ports located on said housing and configured as outputs of said resistive splitter network, said plurality of first output ports for outputting service provider signals to customer devices and for receiving signals directed to the service provider, and said plurality of first output ports also for transmitting and receiving signals associated with an in-home network, allowing customer devices within the home network to communicate with each other, said plurality of first output ports functioning as “CATV and in-home network” ports;
a first diplexer having a full frequency band terminal, a high frequency band terminal and a low frequency band terminal, wherein said full frequency band terminal is connected to said input port;
a second diplexer having a full frequency band terminal, a high frequency band terminal and a low frequency band terminal, wherein said full frequency band terminal is connected to said input of said resistive splitter network;
a first amplifier having an input connected to said high frequency band terminal of said first diplexer and an output connected to said high frequency band terminal of said second diplexer, wherein signal paths passing through said first and second diplexers are considered an active communications path;
a passive communications path formed within said housing, wherein said passive communications path has no powered elements disposed therein, and wherein a first end of said passive communications path is connected to said input port;
a passive output port located on said housing, which is connected to a second end of said passive communications path, opposite said first end of said passive communications path;
an electrical path between said input of said resistive splitter network and said passive output port;
a filtering device disposed along said electrical path to limit signals traversing along said electrical path to in-home network frequencies; and
a first directional coupler, having first, second and third terminals, wherein signals passing between said first and third terminals in either direction encounter a first level of attenuation, signals passing between said second and third terminals encounter a second level of attenuation greater than said first level of attenuation, and signals passing between said first and second terminals encounter a third level of attenuation greater than said second level of attenuation, wherein said first terminal of said first directional coupler is connected to said active communications path, said second terminal of said first directional coupler is connected to said passive communication path, and said third terminal of said first directional coupler is connected to said input port.
20. The RF signal amplifier of claim 19 , further comprising:
a relay having a first terminal directly connected to said first terminal of said first directional coupler, a second terminal directly connected to said active communications path, and a third terminal directly connected to a grounded impedance, wherein said relay connects said first terminal to said second terminal when power is being provided to said at least one power amplifier, and said relay connects said first terminal to said third terminal when power is not being provided to said at least one power amplifier.