Neven N Pischl

6414561, Jul 2, 2002

Nov 21, 2001

09/991486

Neven Pischl - Santa Clara CA

Cisco Technology, Inc. - San Jose CA

H04B 332

333 12, 333260

A conductive area or layer of a circuit board is aligned with, and spaced from, a portion of a first differential signal conductor pair and connected through a conductive pathway to one of the conductors of a second differential signal conductor pair to provide capacitive coupling for compensating an imbalance arising from non-symmetric pin assignments. By compensating the imbalance, signal quality and/or immunity is improved and noise and/or emission is reduced.

8076990, Dec 13, 2011

May 20, 2009

12/454586

Neven Pischl - Santa Clara CA, US

Broadcom Corporation - Irvine CA

H04B 3/28
H03H 7/00

333 12, 333177, 333181, 333185

According to one exemplary embodiment, a connector for coupling a communications medium to an electronic device includes a common-mode suppression block coupled to a number of connector pins. The common-mode suppression block is configured to reduce common-mode noise coupling between the communications medium and the connector pins in the connector. The common-mode suppression block is further configured to provide substantially no attenuation to a differential-mode signal. In one embodiment, the communications medium is an Ethernet cable and the connector is an Ethernet plug. In one embodiment, the common-mode suppression block comprises common-mode chokes. In one embodiment, the connector is an RJ45 plug.

8582710, Nov 12, 2013

Mar 31, 2011

13/077506

Neven Pischl - Santa Clara CA, US
Joseph Cordaro - Irvine CA, US
Yongbum Kim - Los Altos Hills CA, US

Broadcom Corporation - Irvine CA

H04L 7/04

375362, 375130, 375140, 375147, 375316, 375148, 375354, 375356, 375371, 375373, 375376, 375374, 375375

Embodiments allow for the use of the SS modulation technique (and thus for significant reduction of EMI due to clock transmission) in scenarios involving tight synchronization requirements between two devices. In particular, embodiments can be used in high-speed communication networks (e. g. , high-speed Ethernet) where a clock signal embedded in the data stream at the transmitter and recovered from the data stream at the receiver is the only source for synchronization between the transmitter and the receiver (i. e. , no other synchronization channel available). Embodiments are also especially useful in communication systems utilizing echo cancellers.

20060121801, Jun 8, 2006

Jan 13, 2005

11/034670

Neven Pischl - Santa Clara CA, US

H01R 13/73

439894000

A wired media connector includes a body, a receptacle, a plurality of isolation transformers, and a Printed Circuit Board (PCB) interface. The receptacle includes a plurality of signal line contacts formed to exactly meet a plurality of signal line contacts of a wired media plug. Each isolation transformer includes a primary side having a pair of primary differential signal line connections and a secondary side having a pair of secondary differential signal line connections and a center tap. The PCB interface is formed on the body and has a plurality of PCB interface signal line groups. Each PCB interface signal line group includes a pair of PCB differential signal line connections communicatively coupled to a pair of secondary differential signal line connections of a corresponding isolation transformer and a center tap PCB connection communicatively coupled to the center tap of the secondary side of the corresponding isolation transformer.

20080122448, May 29, 2008

Nov 27, 2006

11/563349

Neven Pischl - Santa Clara CA, US

G01R 29/00

324600

A method and system for detecting transformer saturation in a communication interface is provided. The method may include detecting a change in impedance resulting from transformer saturation of at least one isolation transformer utilized in a network path of a network. The network may conform to an IEEE 802.3af specification where power may be delivered through the network. The method may further comprise generating a pulse at a one end of the network and measuring a reflection at that end to detect the transformer saturation. In response to the impedance change, a transmitter signal may be pre-distorted in order to compensate for the detected transformer saturation, or the power delivered over the network may be disabled.

20110243254, Oct 6, 2011

Jul 6, 2010

12/803818

Neven Pischl - Santa Clara CA, US

BROADCOM CORPORATION - Irvine CA

H04L 25/00

375257

Disclosed is a communications interface to connect to a first device and to establish a communication between the first device and a second device over a medium. The communications interface comprises at least one common mode choke having a first end configured to connect to an Ethernet transceiver of the first device. The communications interface further comprises an optional capacitor having a first end coupled to a second end of the at least one common mode choke and having a second end configured to connect to the medium. The communications interface does not include any transformers connected to the second end of the at least one common mode choke. The Ethernet communications is readily adaptable to differential-pair cabling and applications in harsh electromagnetic interference environments, such as automotive, aero-space, air crafts, water crafts, trains, railroad and marine applications, where high rejection of EMI is required.

61778044, Jan 23, 2001

Dec 3, 1998

9/205025

Neven Pischl - Santa Clara CA
John Lockwood - Dublin CA

Nortel Networks Limited - Montreal

G01R 2728

324627

According to one embodiment of the present invention, a voltage probe for measuring common-mode (CM) voltage of a device under test (DUT) having differential input/output (I/O) signals is disclosed. The probe includes a connector adapted to couple to the DUT, at least one output measurement port configured to connect to a measuring device for measuring the CM voltage, and at least one differential pair cable connected to a connector and to a at least one measurement port for coupling a differential I/O signals to a measurement port. According to a second embodiment, the present invention provides a voltage probe for measuring CM voltage of a DUT having differential I/O signals while the DUT is simultaneously connected to an auxiliary equipment. According to a third embodiment, the present invention provides a method for measuring EMI from a DUT. A CM voltage probe is interposed between the DUT and an EMI measurement device.

20140226753, Aug 14, 2014

Apr 15, 2014

14/253531

- Irvine CA, US
Neven Pischl - Santa Clara CA, US

Broadcom Corporation - Irvine CA

H04B 1/04

375297

A method and system for mitigating transformer saturation in a communication interface is provided. The method may include detecting a change in impedance resulting from transformer saturation of at least one isolation transformer utilized in a network path of a network. The network may conform to an IEEE 802.3af specification where power may be delivered through the network. The method may further comprise generating a pulse at a one end of the network and measuring a reflection at that end to detect the transformer saturation. In response to the impedance change, a transmitter signal may be pre-distorted in order to compensate for the detected transformer saturation, or the power delivered over the network may be disabled.