Resources Contact Us Home
Delay locked loop for use in semiconductor memory device

Image Number 3 for United States Patent #6434062.

It is provided a delay locked loop for obtaining a reduced jitter and a stable time delay adjustment to thereby perform a bi-directional time delay with a small area even at low frequency applications. The delay locked loop includes an input unit for receiving a clock signal and a non-clock signal and comparing received signals to produce an internal clock signal, a controller for receiving the internal clock to produce a control signal, a bi-directional oscillator, responsive to the control signal from the control means, for performing a ring oscillation in a first or second direction and fulfilling an addition and subtraction adjustment function for a time delay, a counter for receiving an output signal of the bi-directional oscillator and counting the number that the signal is passed therethrough, and an AND gate for performing a combination operation on the outputs of the bi-directional oscillating means and the counting means, to produce the result as a final internal clock signal.

  Recently Added Patents
Filtering method for improving the data quality of geometric tire measurements
Hierarchical binding and lookup of addresses in inter-process communications systems
Image forming system, prognosis criterion setting apparatus, prognosis apparatus, image forming apparatus and non-transitory computer-readable recording medium
Random sampling for geophysical acquisitions
Method of making a CIG target by cold spraying
IR(voltage) drop analysis in integrated circuit timing
Inducement of organogenetic tolerance for pancreatic xenotransplant
  Randomly Featured Patents
Finger identification
Strap connecting buckle
Dottable active collector driver circuit
Endless power transmission belt construction and method of making the same
Methods of forming semiconductor constructions
Round vented container
Method for preparing a prostacyclin intermediate
Auxiliary pump scheme for a cooling system in a hybrid-electric vehicle
Kinetic-energy projectile having a large length to diameter ratio