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
Press nut
High-speed comparator with asymmetric frequency response
Image output method and device, and image display
Boundary acoustic wave device
Method and apparatus for receiving signals in a MIMO system with multiple channel encoders
Use of beta-adrenoceptor antagonists for the manufacture of a medicament of the treatment of disorders of the outer retina
Workflow optimization for high throughput imaging environments
  Randomly Featured Patents
Food warmer
Data bus interface with interruptible clock
Interspecific tree named `Glory Red`
Burn-in technologies for unpackaged integrated circuits
Electrode arrangement for taking electrocardiograms
Cammed connector pin assembly and associated excavation apparatus
Method and apparatus for unscrambling sync-suppressed television signals
Method for producing a micro-gripper
Static switch for motors of climate control units and climate control unit comprising the switch
Detecting human cancer through spectral optical imaging using key water absorption wavelengths