Operation guarantee system

Details Operation guarantee system Operation guarantee system

2008-06-27

2011-12-06

Zarabian, Amir (Department: 2827)

Static information storage and retrieval

Read/write circuit

Signals

C365S223000, C365S233110, C365S193000

Reexamination Certificate

active

08072824

ABSTRACT:
An operation guarantee system includes a decoder circuit, a comparison circuit, a CPU circuit, a frequency adjustment circuit and a DQ adjustment circuit. The comparison circuit compares a test data signal input from the decoder circuit with an expected value data signal input from the exterior, and detects the presence or absence of an output error in the decoder circuit. The CPU circuit controls the frequency adjustment circuit and the DQ adjustment circuit to vary a frequency of a clock signal input to an external memory and a delay amount of the data signal. In addition, the CPU circuit acquires a result of detection of the comparison circuit under various conditions. Then, the CPU circuit determines an appropriate frequency of the clock signal input to the external memory based on a relationship between the various conditions and the presence or absence of the output error.

REFERENCES:
patent: 6370067 (2002-04-01), Ko et al.
patent: 2001/0056521 (2001-12-01), Fujiwara et al.
patent: 2002/0188899 (2002-12-01), Yamazaki
patent: 2003/0231042 (2003-12-01), Lin et al.
patent: 2005/0135167 (2005-06-01), Manabe
patent: 2005/0242850 (2005-11-01), Kawasaki
patent: 2005/0264331 (2005-12-01), Lin et al.
patent: 2006/0140045 (2006-06-01), Kishimoto et al.
patent: 2007/0291555 (2007-12-01), Kishimoto et al.
patent: 2008/0291749 (2008-11-01), Kishimoto et al.
patent: 8-110872 (1996-04-01), None
patent: 8-137783 (1996-05-01), None
patent: 2001-160000 (2001-06-01), None
patent: 2001-290697 (2001-10-01), None
patent: 2002-366421 (2002-12-01), None
patent: 2005-141725 (2005-06-01), None
patent: 2005-530297 (2005-10-01), None
patent: 2006-107352 (2006-04-01), None
patent: 2006-189916 (2006-07-01), None
patent: 2006-338130 (2006-12-01), None
English language Abstract of JP 8-110872, Apr. 30, 1996.
English language Abstract of JP 8-137783, May 31, 1996.
English language Abstract of JP 2006-338130, Dec. 14, 2006.
English language Abstract of JP 2001-160000, Jun. 12, 2001.

Affiliated with

Also associated with

Rating

Operation guarantee system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Operation guarantee system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Operation guarantee system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4259884