Hsiao-Yuan Bruce Li
Engineers at Schroeder Rd, Dallas, TX
License number
Colorado 30573
Issued Date
Jul 7, 1995
Renew Date
Aug 1, 1999
Expiration Date
Aug 1, 1999
Type
Professional Engineer
Address
Address
12708 Schroeder Rd STE 104, Dallas, TX 75243
Professional information
Method And Apparatus For Testing And Setting Magnetic Field Strength Of Permanent Magnets In Magnetic Bubble Domain Modules
US Patent:
4158811, Jun 19, 1979
Filed:
Jun 27, 1977
Appl. No.:
5/810148
Inventors:
Hsiao-Yuan Li - Dallas TX
Rex A. Naden - Richardson TX
Alvis D. Stephenson - Dallas TX
Gene D. Lee - Dallas TX
Rex A. Naden - Richardson TX
Alvis D. Stephenson - Dallas TX
Gene D. Lee - Dallas TX
Assignee:
Texas Instruments Incorporated - Dallas TX
International Classification:
G01R 3312
US Classification:
324210
Abstract:
Method and apparatus for testing and setting the field strength of permanent magnets in a magnetic bubble domain chip module, wherein the final molded module is formed to contain a pair of longitudinal slots which run through the module on opposite sides thereof. The module is inserted, via said slots, onto conducting members of a magnetic bubble module testing apparatus. The conducting members effectively provide one turn coils on each side of the module. Current is induced in these coils in such a way as to either add to or subtract from the bias field provided for the magnetic bubble domain chip by the permanent magnets of the module. The module is tested to determine the upper and lower operating levels of the bias field for effective operation of the chip, and the device is remagnetized to set the bias field of the module in the center, or optimal point, of the bias margin.