HOME NETWORK FREQUENCY CONDITIONING DEVICE

• US 20120054805A1
• Filed: 07/07/2011
• Published: 03/01/2012
• Est. Priority Date: 08/30/2010
• Status: Abandoned Application

• Current Assignee: PPC Broadband Incorporated (Belden Inc.)
• Original Assignee: John Mezzalingua Associates Incorporated
• Inventors: Shafer, Steven K., Alkan, Erdogan
• Application Number:
  US13/178,149
• Publication Number:
  US 20120054805A1
• Time in Patent Office: Days
• US Class Current: 725/78
• CPC Class Codes: H04L 12/2801 Broadband local area networks
• CPC Class Codes: H04N 7/106 for domestic distribution

Abstract

This invention disclosure relates to a conditioning device for improving the frequency response of signals conducted within an in-home cable infrastructure that includes both CATV bandwidth and in-home entertainment bandwidth. Disclosed is a CATV network device which includes a CATV signal transmission path and an in-home entertainment signal transmission path. Also disclosed is a signal conditioning circuit that is placed along the in-home entertainment signal transmission path. The signal conditioning circuit includes at least one LC resonant shunt circuit and at least one LC resonant tank circuit. In a particular embodiment two signal conditioning circuits are used. The CATV network device attenuates and equalizes the in-home entertainment signals transmitted along the in-home entertainment signal path so that the in-home entertainment signals don'"'"'t interfere with the CATV signals.

Claims

1. A signal conditioning circuit for community access television equipment comprising:

an in-home entertainment signal transmission path, wherein the in-home entertainment signal transmission path conducts in-home entertainment signals between a first node and a second node;

a first LC resonant shunt circuit comprising;

a first LC resonant shunt circuit first end electrically coupled to the in-home entertainment signal transmission path;

a first LC resonant shunt circuit second end electrically coupled to a current return path;

a first inductor;

a first capacitor in series with the first inductor; and

a first resistor in parallel with the first inductor; and

a first LC resonant tank circuit coupled in series along the in-home entertainment signal transmission path, wherein the first LC resonant tank circuit comprises a second inductor in parallel with a second capacitor.

2. The circuit of claim 1, wherein the first resistor is in parallel with both the first inductor and the first capacitor.

3. The circuit of claim 1, wherein the first LC resonant tank circuit further comprises a second resistor in series with the second capacitor.

4. The circuit of claim 1, wherein the first LC resonant tank circuit further comprises a second resistor in parallel with the second capacitor.

5. The circuit of claim 3, further comprising:

a second LC resonant shunt circuit comprising;

a second LC resonant shunt circuit first end electrically coupled to the in-home entertainment signal transmission path;

a second LC resonant shunt circuit second end electrically coupled to a current return path;

a third capacitor;

a third inductor in series with the third capacitor; and

a third resistor in parallel with the third inductor; and

a second LC resonant tank circuit coupled in series along the in-home entertainment signal transmission path, wherein the second LC resonant tank circuit comprises a fourth inductor in parallel with a fourth capacitor.

6. The circuit of claim 5, wherein the third resistor is in parallel with both the third inductor and the third capacitor.

7. The circuit of claim 6, wherein the second LC resonant tank circuit further comprises a fourth resistor in parallel with both the fourth inductor and the fourth capacitor.

8. The circuit of claim 5, wherein the second LC resonant tank circuit further comprises a fourth resistor in series with the fourth capacitor.

9. The circuit of claim 8, further comprising:

a third LC resonant shunt circuit comprising;

a third LC resonant shunt circuit first end electrically coupled to the in-home entertainment signal transmission path;

a third LC resonant shunt circuit second end electrically coupled to a current return path;

a fifth capacitor;

a fifth inductor in series with the fifth capacitor; and

a fifth resistor in parallel with the fifth inductor.

10. The circuit of claim 9, wherein the fifth resistor is in parallel with both the fifth inductor and the fifth capacitor.

11. A community access television network device comprising:

a community access television signal transmission path, wherein the community access television signal transmission path conducts community access television downstream signals in a first frequency range and community access television upstream signals in a second frequency range that is different from the first frequency range, and wherein the community access television signal transmission path rejects in-home entertainment signals in a third frequency range that is different from the first frequency range and the second frequency range; and

an in-home entertainment signal transmission path, wherein the in-home entertainment signal transmission path conducts community access television downstream signals in the first frequency range, community access television upstream signals in the second frequency range, and in-home entertainment signals in the third frequency range.

12. The device of claim 11, wherein the in-home entertainment signal transmission path comprises a signal conditioning circuit, the signal conditioning circuit comprising:

at least one LC resonant shunt circuit; and

at least one LC resonant tank circuit.

13. The device of claim 11, wherein the in-home entertainment signal transmission path comprises two signal conditioning circuits, wherein each of the two signal conditioning circuits comprise:

at least one LC resonant shunt circuit; and

at least one LC resonant tank circuit.

14. The device of claim 13, wherein in-home entertainment signals in the third frequency range are attenuated an amount in the range of −

1 dB to −

30 dB in response to passing through the two signal conditioning circuits.

15. The device of claim 13, wherein in-home entertainment signals in the third frequency range are attenuated an amount in the range of −

15 dB to −

20 dB in response to passing through the two signal conditioning circuits.

16. A method of conditioning in-home entertainment signals in a community access television system comprising the steps of:

placing a first signal conditioning circuit in series electrical connection with an in-home entertainment signal transmission path, wherein the first signal conditioning circuit comprises;

one or more than one first signal conditioning circuit LC resonant shunt circuit, wherein each of the one or more than one first signal conditioning circuit LC resonant shunt circuits comprise a resistor in parallel with an inductor; and

one or more than one first signal conditioning circuit LC resonant tank circuit; and

placing a second signal conditioning circuit in series electrical connection with the in-home entertainment signal transmission path, wherein the second signal conditioning circuit comprises;

one or more than one second signal conditioning circuit LC resonant shunt circuit, wherein each of the one or more than one second signal conditioning circuit LC resonant shunt circuits comprises a resistor in parallel with both an inductor and a capacitor; and

one or more than one second signal conditioning circuit LC resonant tank circuit.

17. The method of claim 16, further comprising the step of:

placing a resistor in series with a capacitor in each of the one or more than one first signal conditioning circuit LC resonant tank circuits.

18. The method of claim 17, further comprising the step of:

placing a resistor in parallel with a capacitor in each of the one or more than one second signal conditioning circuit LC resonant tank circuits.

19. The method of claim 18, wherein the first signal conditioning circuit comprises:

three first signal conditioning circuit LC resonant shunt circuits; and

two first signal conditioning circuit LC resonant tank circuits.

20. The method of claim 19, wherein the second signal conditioning circuit comprises:

three second signal conditioning circuit LC resonant shunt circuits; and

two second signal conditioning circuit LC resonant tank circuits.