Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Bist DDR memory interface circuit and method for testing the same










Image Number 4 for United States Patent #8035407.

An apparatus and method for self-testing a DDR memory interface are disclosed. In one aspect, a built-in-self-test (BIST) memory interface circuit includes a signal multiplier for receiving a first clock signal from a tester and outputs a multiplied clock signal. A first multiplexer is used for selecting between a test mode and a normal operating mode and provides an output signal. A delay magnitude generator is coupled to the signal multiplier to receive the multiplied clock signal and provides a second clock signal and a phase control signal. A plurality of digitally controlled delay line blocks are used for each receiving the second clock signal and the phase control signal and outputting a phase shifted data strobe output signal in response to receiving an internal data strobe input signal. A second multiplexer selects one of the internal data strobe input signals and a third multiplexer selects the phase shifted data strobe output signal that corresponds to the selected internal data strobe input signal. A phase detector determines a phase difference between the selected internal data strobe input signal and the selected phase shifted data strobe output signal and outputs a phase difference value.








 
 
  Recently Added Patents
System and method for optimizing teams
Non-zero rounding and prediction mode selection techniques in video encoding
Apparatus and method to simulate a power trip to a disk drive
Compositions of PD-1 antagonists and methods of use
Image generation device with optimized dose control
Generating network topology parameters and monitoring a communications network domain
System and method for redundant array copy removal in a pointer-free language
  Randomly Featured Patents
Substrate processing method and substrate processing apparatus
Novel cell-cidal antibiotic 82-85-8A and its production
Table device, film-forming apparatus, optical element, semiconductor element, and electric apparatus
Register assembly for covering an air duct opening
Device for guiding the movement of a transducer of an ultrasonic probe
Package substrate manufactured using electrolytic leadless plating process, and method for manufacturing the same
Method of forming an image with photographic likeness on chocolate
Speed reducer base
Spacecraft methods and structures with enhanced attitude control that facilitates gyroscope substitutions
Writing instrument