IP Library › Granted Patent US 7,643,260
Granted Patent B2
US 7,643,260 · App. 11/546,450 · Granted Jan 5, 2010

System for EMI filter surge voltage clamping

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Quick Facts
Patent No.
US 7,643,260
App. No.
11/546,450
Granted
Jan 5, 2010
Kind
B2
Abstract

A pair of back-to-back-coupled zener diodes is coupled from the input to the output of each leg of a common mode choke used in a LC circuit for reducing EMI into the power supply of an electrical device. The reversed biased zener diode of each pair breaks down when ringing voltage amplitude resulting from a voltage surge applied at the inputs of the common mode choke exceeds the breakdown threshold voltage of the zener diode. Transorb devices may be substituted for the back-to-back-coupled diode pairs.

Claims (8)

1. A system for protecting components of a EMI suppression circuit having a common mode capacitor and a common mode choke from common mode surge voltage ringing, wherein the common mode choke includes a first inductor and a second inductor, comprising:

a first back-to-back avalanche device pair coupled in parallel with the first inductor of the common mode choke, and a second back-to-back avalanche device pair coupled in parallel with the second inductor of the common mode choke.

2. The system of claim 1 wherein the back-to-back avalanche device pair includes two zener diodes coupled to one another at the anode of each zener diode.

3. The system of claim 2 wherein one of the cathodes of the back-to-back avalanche device is coupled to an input of the common mode choke and the other cathode of the back to back device is coupled to a corresponding output of the common mode choke.

4. The system of claim 1 wherein the back-to-back avalanche device is a transorb.

5. The system of claim 1 wherein the back-to-back avalanche device pair includes two zener diodes coupled to one another at the cathode of each zener diode.

6. The system of claim 5 wherein one of the anodes of the back-to-back avalanche device is coupled to an input of the common mode choke and the other anode of the back to back device is coupled to a corresponding output of the common mode choke.

7. The system of claim 1 wherein the back-to-back avalanche device is a transorb.

Assignments (12)
RELEASE OF SECURITY INTEREST AT REEL/FRAME 049905/0504 Recorded Dec 19, 2024
From: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
To: ARRIS ENTERPRISES LLC (F/K/A ARRIS ENTERPRISES, INC.); ARRIS TECHNOLOGY, INC.; ARRIS SOLUTIONS, INC.; COMMSCOPE, INC. OF NORTH CAROLINA; COMMSCOPE TECHNOLOGIES LLC; RUCKUS WIRELESS, LLC (F/K/A RUCKUS WIRELESS, INC.)
Reel/Frame 071477/0255 →
SECURITY INTEREST Recorded Nov 19, 2021
From: ARRIS SOLUTIONS, INC.; ARRIS ENTERPRISES LLC; COMMSCOPE TECHNOLOGIES LLC; COMMSCOPE, INC. OF NORTH CAROLINA; RUCKUS WIRELESS, INC.
To: WILMINGTON TRUST
Reel/Frame 060752/0001 →
TERM LOAN SECURITY AGREEMENT Recorded Jul 3, 2019
From: COMMSCOPE, INC. OF NORTH CAROLINA; COMMSCOPE TECHNOLOGIES LLC; ARRIS ENTERPRISES LLC; ARRIS TECHNOLOGY, INC.; RUCKUS WIRELESS, INC.; ARRIS SOLUTIONS, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 049905/0504 →
ABL SECURITY AGREEMENT Recorded Jul 3, 2019
From: COMMSCOPE, INC. OF NORTH CAROLINA; COMMSCOPE TECHNOLOGIES LLC; ARRIS ENTERPRISES LLC; ARRIS TECHNOLOGY, INC.; RUCKUS WIRELESS, INC.; ARRIS SOLUTIONS, INC.
To: JPMORGAN CHASE BANK, N.A.
Reel/Frame 049892/0396 →
PATENT SECURITY AGREEMENT Recorded Jul 3, 2019
From: ARRIS ENTERPRISES LLC
To: WILMINGTON TRUST, NATIONAL ASSOCIATION, AS COLLATERAL AGENT
Reel/Frame 049820/0495 →
CHANGE OF NAME Recorded Jun 25, 2019
From: ARRIS ENTERPRISES, INC.
To: ARRIS ENTERPRISES LLC
Reel/Frame 049586/0470 →
TERMINATION AND RELEASE OF SECURITY INTEREST IN PATENTS Recorded Apr 8, 2019
From: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
To: ARRIS GROUP, INC.; ARRIS ENTERPRISES, INC.; ARRIS SOLUTIONS, INC.; ARRIS KOREA, INC.; ARRIS HOLDINGS CORP. OF ILLINOIS, INC.; BIG BAND NETWORKS, INC.; TEXSCAN CORPORATION; POWER GUARD, INC.; 4HOME, INC.; ACADIA AIC, INC.; AEROCAST, INC.; BROADBUS TECHNOLOGIES, INC.; GENERAL INSTRUMENT CORPORATION; GENERAL INSTRUMENT AUTHORIZATION SERVICES, INC.; GENERAL INSTRUMENT INTERNATIONAL HOLDINGS, INC.; IMEDIA CORPORATION; JERROLD DC RADIO, INC.; LEAPSTONE SYSTEMS, INC.; MODULUS VIDEO, INC.; MOTOROLA WIRELINE NETWORKS, INC.; NETOPIA, INC.; NEXTLEVEL SYSTEMS (PUERTO RICO), INC.; QUANTUM BRIDGE COMMUNICATIONS, INC.; SETJAM, INC.; SUNUP DESIGN SYSTEMS, INC.; UCENTRIC SYSTEMS, INC.; GIC INTERNATIONAL HOLDCO LLC; GIC INTERNATIONAL CAPITAL LLC; CCE SOFTWARE LLC; THE GI REALTY TRUST 1996
Reel/Frame 048825/0294 →
CHANGE OF NAME Recorded Mar 14, 2017
From: ARRIS ENTERPRISES INC
To: ARRIS ENTERPRISES LLC
Reel/Frame 041995/0031 →
SECURITY AGREEMENT Recorded May 28, 2013
From: ARRIS GROUP, INC.; ARRIS ENTERPRISES, INC.; ARRIS SOLUTIONS, INC.; ARRIS KOREA, INC.; ARRIS HOLDINGS CORP. OF ILLINOIS; BIGBAND NETWORKS, INC.; TEXSCAN CORPORATION; POWER GUARD, INC.; 4HOME, INC.; ACADIA AIC, INC.; AEROCAST, INC.; BROADBUS TECHNOLOGIES, INC.; GENERAL INSTRUMENT CORPORATION; GENERAL INSTRUMENT AUTHORIZATION SERVICES, INC.; GENERAL INSTRUMENT INTERNATIONAL HOLDINGS, INC.; IMEDIA CORPORATION; JERROLD DC RADIO, INC.; LEAPSTONE SYSTEMS, INC.; MODULUS VIDEO, INC.; MOTOROLA WIRELINE NETWORKS, INC.; NETOPIA, INC.; NEXTLEVEL SYSTEMS (PUERTO RICO), INC.; QUANTUM BRIDGE COMMUNICATIONS, INC.; SETJAM, INC.; SUNUP DESIGN SYSTEMS, INC.; UCENTRIC SYSTEMS, INC.; GIC INTERNATIONAL HOLDCO LLC; GIC INTERNATIONAL CAPITAL LLC; CCE SOFTWARE LLC; THE GI REALTY TRUST 1996
To: BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT
Reel/Frame 030498/0023 →
MERGER Recorded Apr 16, 2013
From: ARRIS GROUP, INC.
To: ARRIS ENTERPRISES, INC.
Reel/Frame 030223/0244 →
MERGER Recorded Feb 13, 2013
From: ARRIS INTERNATIONAL, INC.
To: ARRIS GROUP, INC.
Reel/Frame 029803/0697 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 11, 2006
From: PIERCE, JASON; HUGHES, BRENT
To: ARRIS INTERNATIONAL, INC.
Reel/Frame 018414/0651 →