Bin Liu

US Patent:

8296710, Oct 23, 2012

Filed:

Jul 28, 2010

Appl. No.:

12/845204

Inventors:

Bin Liu - Los Angeles CA, US
Zhiru Zhang - Los Angeles CA, US
Jason Cong - Pacific Palisades CA, US

Assignee:

Xilinx, Inc. - San Jose CA

International Classification:

G06F 17/50

US Classification:

716132, 716133, 716134, 716135

Abstract:

A method for implementing soft constraints in scheduling comprises receiving a description of circuit behavior. The description is un-timed. A scheduling solution is generated for use in scheduling the description. The scheduling solution includes scheduling variables and an objective function. The scheduling variables schedule the time of at least one operation. The objective function includes a penalty term and constraints comprising at least one hard constraint and at least one soft constraint. The constraints are created on the scheduling variables. The penalty term comprises a slack variable representing violations of the constraints. The penalty term measures the design cost of violating the soft constraint. Following generation of the scheduling solution, the description is scheduled by applying the scheduling solution to the description. Timing information of the description is provided as an output of the scheduling.

US Patent:

20160231581, Aug 11, 2016

Filed:

Feb 9, 2015

Appl. No.:

14/616882

Inventors:

Bin Liu - Camarillo CA, US

International Classification:

G02B 27/28

Abstract:

A multiple laser optical assembly comprises two laser subassemblies with two lasers bonded on two bases respectively, a polarization beam combiner (PBC), a lens, a mechanical housing and an optical fiber. The two subassemblies are configured to have orthogonal polarization directions from the two lasers and are assembled coaxially. The PBC combines the orthogonal polarized beams from the two lasers. The lens focuses the combined beam and couples into the optical fiber. With such a two laser optical assembly as a building block and a wavelength division multiplexing (WDM) filter to combine the beams from two of such type of two laser optical assembly, one can further build a four laser optical assembly and extend to even more channel multiple laser optical assembly by adding more WDM filters and more similar two laser optical assemblies.