Network device with power potential rectifier

• US 7,500,118 B2
• Filed: 11/21/2005
• Issued: 03/03/2009
• Est. Priority Date: 03/28/2005
• Status: Active Grant

• Current Assignee: Kinetic Technologies International Holdings LP
• Original Assignee: Akros Silicon, Inc. (Kinetic Technologies Incorporated)
• Inventors: Crawley, Philip John, Camagna, John R.
• Primary Examiner(s): SURYAWANSHI, SURESH
• Application Number:
  US11/284,998
• Publication Number:
  US 20060238252A1
• Time in Patent Office: 1,198 Days
• Field of Search: 713/300, 713/340
• US Class Current: 713/300
• CPC Class Codes: H04L 12/12 Arrangements for remote connection or disconnection of substations or of equipment thereof
• CPC Class Codes: H04L 25/0266 Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling
• CPC Class Codes: Y02D 30/50 in wire-line communication networks, e.g. low power modes or reduced link rate

Abstract

In a network device, a power potential rectifier is adapted to conductively couple a network connector to an integrated circuit that rectifies and passes a power signal and data signal received from the network connector. The power potential rectifier regulates a received power and/or data signal to ensure proper signal polarity is applied to the integrated circuit.

Claims

1. A network device comprising:

a power potential rectifier comprising a transistor bridge comprising a plurality of transistors with source and bulk connections tied to output voltage lines adapted to conductively couple a network connector to an integrated circuit that rectifies and passes a power signal and data signal received from the network connector, the power potential rectifier regulating a received power and/or data signal to ensure proper signal polarity is applied to the integrated circuit.

2. The network device according to claim 1 wherein:

the power potential rectifier is configured to couple directly to lines of the network connector and regulate the power signal whereby the power potential rectifier passes the data signal with substantially no degradation.

3. The network device according to claim 1 wherein:

the network connector receives a plurality of twisted pair conductors; and

any one of a subset of the twisted pair conductors can forward bias to deliver current and the power potential rectifier can forward bias a return current path via a remaining conductor of the subset.

4. The network device according to claim 1 further comprising:

at least one transformer coupled across line pairs of the network connector comprising a coil and a center tap coupled to the coil, the center tapping configured to separate the power signal from the data signal; and

the power potential rectifier coupled to the center tap of the at least one transformer and configured to regulate the power signal.

5. The network device according to claim 1 further comprising:

the transistor bridge integrated onto the integrated circuit that rectifies and passes a power signal and data signal received from the network connector.

6. The network device according to claim 5 wherein:

the transistor bridge couples directly to lines of the network connector and regulates the power signal whereby the transistor bridge passes the data signal with substantially no degradation.

7. The network device according to claim 5 further comprising:

the transistor bridge transistors being selected from a group consisting of metal oxide semiconductor (MOS) transistors, junction field effect transistors (JFET), switchable devices, and impedance control devices.

8. The network device according to claim 1 further comprising:

a metal oxide semiconductor (MOS) bridge integrated unto the integrated circuit that rectifies and passes a power signal and data signal received from the network connector.

9. The network device according to claim 8 further comprising:

at least one transformer coupled across line pairs of the network connector comprising a coil and a center tap coupled to the coil, the center tapping configured to separate the power signal from the data signal; and

the MOS bridge coupled to the center tap of the at least one transformer and configured to regulate the power signal.

10. The network device according to claim 8 further comprising:

the metal oxide semiconductor (MOS) bridge comprising N-channel metal oxide semiconductor (NMOS) transistors and P-channel metal oxide semiconductor (PMOS) transistors connected in a bridge configuration that emulates a diode bridge whereby pairs of NMOS transistors replace diodes that connect to ground and pairs of PMOS transistors replace diodes that connect to a power line.

11. The network device according to claim 1 further comprising:

a T connect element and an Ethernet physical layer (PHY) module integrated into the integrated circuit, the T connect element being adapted to enable ground potential of the Ethernet PHY module to float relative to earth ground; and

a metal oxide semiconductor (MOS) bridge integrated onto the integrated circuit and coupled to the T connect element.

12. The network device according to claim 1 further comprising:

the transistor bridge integrated onto the integrated circuit, the transistor bridge comprising transistors configured to enable relatively large drain-source voltage V_ds and relatively small gate-source voltage V_gs.

13. The network device according to claim 12 further comprising:

the transistor bridge comprising a plurality of lateral double-diffused metal oxide semiconductor (LDMOS) transistors configured to enable relatively large drain-source voltage V_ds and relatively small gate-source voltage V_gs.

14. The network device according to claim 12 further comprising:

the transistor bridge comprising a plurality of metal oxide semiconductor field-effect transistors (MOSFETs), the individual MOSFETS coupled to a limiter configured to maintain an essentially constant gate-source voltage V_gs across the MOSFET at approximately a process limit whereby resistance is minimized or reduced.

15. The network device according to claim 12 further comprising:

the transistor bridge comprising a plurality of metal oxide semiconductor field-effect transistors (MOSFETs), the individual MOSFETs coupled to a limit and disable circuit configured to maintain an essentially constant gate-source voltage V_gs across the MOSFET at approximately a process limit whereby resistance is minimized or reduced, and to disable transistor bridge devices on opposing power lines whereby gates of a MOSFET bridge are turned off for lines that are not powered.

16. The network device according to claim 1 further comprising:

a T connect element and an Ethernet physical layer (PHY) module integrated into the integrated circuit, the T connect element adapted to enable ground potential of the Ethernet PHY module to float relative to earth ground; and

the power potential rectifier integrated onto the integrated circuit and coupling individual lines of the network connector into T connect elements.

18. The apparatus according to claim 16 further comprising:

the transistor bridge transistors being selected from a group consisting of metal oxide semiconductor (MOS) transistors, junction field effect transistors (JFET), switchable devices, and impedance control devices.

19. The apparatus according to claim 16 wherein:

the transistor bridge couples directly to lines of a network connector and regulates the power signal whereby the transistor bridge passes the data signal with substantially no degradation.

21. The apparatus according to claim 19 further comprising:

the metal oxide semiconductor (MOS) bridge comprising N-channel metal oxide semiconductor (NMOS) transistors and P-channel metal oxide semiconductor (PMOS) transistors connected in a bridge configuration that emulates a diode bridge whereby pairs of NMOS transistors replace diodes that connect to ground and pairs of PMOS transistors replace diodes that conned to a power line.

22. The apparatus according to claim 19 further comprising:

a T connect element and an Ethernet physical layer (PHY) module integrated into the integrated circuit, the T connect element adapted to enable ground potential of the Ethernet PHY module to float relative to earth ground; and

a metal oxide semiconductor (MOS) bridge integrated onto the integrated circuit and coupled to the T connect element.

23. The apparatus according to claim 19 further comprising:

at least one transformer coupled across line pairs of a network connector comprising a coil and a center tap coupled to the coil, the center tapping configured to separate the power signal from the data signal; and

the MOS bridge coupled to the center tap of the at least one transformer and configured to regulate the power signal.

17. A network communication apparatus comprising:

a transistor bridge comprising a plurality of transistors with source and bulk connections tied to output voltage lines configured for integration into an integrated circuit and adapted to regulate a power and/or data signal to ensure proper signal polarity is applied to the integrated circuit.

20. A network communication apparatus comprising:

a metal oxide semiconductor (MOS) bridge comprising a plurality of metal oxide semiconductor field effect transistors (MOSFET)s with source and bulk connections tied to output voltage lines configured for integration into an integrated circuit and adapted to regulate a power and/or data signal to ensure proper signal polarity is applied to the integrated circuit.