IP Library Granted Patent US 7,378,885
Granted Patent B1
US 7,378,885 · App. 11/959,069 · Granted May 27, 2008

Multiphase divider for P-PLL based serial link receivers

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Quick Facts
Patent No.
US 7,378,885
App. No.
11/959,069
Granted
May 27, 2008
Kind
B1
Abstract

A method for dividing a plurality of multiphase signals comprising performing resetable divider stages to the plurality of multiphase signals forming a plurality of divided multiphase signals having a monotonic increasing phase with equal spacing and an ideal duty cycle of 50% through a plurality of resetable dividers, wherein the plurality of divided multiphase signals have no phase ambiguity; and producing a plurality of periodic reset signals to the plurality of resetable dividers to enable the plurality of resetable dividers to divide the plurality of multiphase signals in a timely correct sequence to form the divided multiphase signal through a reset signal generator, the plurality of periodic reset signals being produced by a combinational network of the reset signal generator, the combination network is configured for generating a number of pulses based on the plurality of multiphase signals and performing a plurality of decimation stages and wherein the periodic reset signals are generated solely in response to the plurality of multiphase signals.

Claims (6)

1. A method for dividing a plurality of multiphase signals, the method comprising:

performing resetable divider stages to the plurality of multiphase signals forming a plurality of divided multiphase signals having a monotonic increasing phase with equal spacing and an ideal duty cycle of 50% through a plurality of resetable dividers, wherein the plurality of divided multiphase signals have no phase ambiguity; and

producing a plurality of periodic reset signals to the plurality of resetable dividers to enable the plurality of resetable dividers to divide the plurality of multiphase signals in a timely correct sequence to form the divided multiphase signal through a reset signal generator, the plurality of periodic reset signals being produced by a combinational network of the reset signal generator, the combinational network is configured for generating a number of pulses based on the plurality of multiphase signals and performing a plurality of decimation stages and wherein the periodic reset signals are generated solely in response to the plurality of multiphase signals.

2. The method as in claim 1 , wherein logical exclusive OR gates of the combinational network generate the number of pulses based on the plurality of multiphase signals.

3. The method as in claim 1 , wherein logical AND gates perform the plurality of decimation stages.

4. The method as in claim 1 , wherein the reset generator includes a master divider operated by a subset of the plurality of multiphase signals, the master divider is configured for selecting a group of the pulses.

Assignments (3)
CHANGE OF NAME Recorded Dec 20, 2021
From: FACEBOOK, INC.
To: META PLATFORMS, INC.
Reel/Frame 058553/0802 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 4, 2012
From: INTERNATIONAL BUSINESS MACHINES CORPORATION
To: FACEBOOK, INC.
Reel/Frame 027991/0473 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 19, 2007
From: KOSSEL, MARCEL A.
To: INTERNATIONAL BUSINESS MACHINES CORPORATION
Reel/Frame 020267/0495 →