Chandra C Varanasi

Affiliation:

Micron Technology

3060 N. First St

San Jose CA 95134

email: cvaranasi@micron.com 

Home Page:

Biography:

Ph.D. - 1993

Electrical Engineering,University of Minnesota, Minneapolis MN 55455

Advisor: Prof. John C. Kieffer

Thesis: "On the Computational Complexity of an Optimal Code for an Input-Restricted Channel"

M.S. - 1988

Electrical Engineering, Kansas State University, Manhattan KS 66502

Advisor: Prof. Stephen A. Dyer

Thesis: "The discrete Hartley Transform"

B.Tech. - 1983

Electronics and Communications Engineering, College of Engineering - Kakinada, JNT University, Hyderabad

WORK HISTORY

1993- 1997  Seagate Technology Simi Valley CA 93065

1997 - 1999 Motorola/Texas Instruments, Tempe, AZ

1999 - 2001 Infineon Technologies Corporation, Santa Cruz, CA

2002 - 2009 Seagate Technology Longmont CO 80503

July 2009 - Present: Micron Technology

PROFESSIONAL EXPERIENCE AND INTERESTS:

- Coding adn Signal Processing for Data Storage devices such as Hard Disk Drive, CD/DVD. In particular, modulation codes such as Run-Length-Limited (RLL) codes and Running Digital Sum (RDS) codes.

- Iterative codes as applied to data storage applications.

- Soft-in Soft-out detection algorithms.

DISTINCTIONS AND HONORS

- Senior Member IEEE

ISSUED US PATENTS

1. Chandra C. Varanasi, Kinhing P. Tsang, "DC-free code having limited error propagation and limited complexity," US Patent 7,218,256; May 15, 2007.
2. Chandra C. Varanasi, Kinhing P. Tsang, "DC-free code having limited error propagation and limited complexity, "US Patent 7, 084, 789; August 1, 2006.
3. Chandra C. Varanasi, "Run-length-limited coding with minimal error propagation," US Patent 6, 674, 375; january 6, 2004.
4. LeRoy A. Volz, Chandra C. Varanasi, Dennis C. Stone, "Rate n/(n+1) code for embedded servo address encoding," US Patent 5,949,358; September 7, 1999.
5. Chandra C. Varanasi, "Coding data in a disk drive according to a code having desired algebraic characteristics," US APtent 5,790,571; August 4, 1998.
6. Chandra C. Varanasi, Nersi Nazari, "Matched-spectral-nul codes fro partial response channels," US Patent 5,646,950; July 8, 1997.

Research Interests:

• Coding Techniques
• Coding Theory
• Communications