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
Headset electronics
Gathering user feedback in web applications
Methods of making a diagnostic device by interweaving hydrophobic and hydrophilic fibers, and diagnostic device therefrom
Network based technique for obtaining operator identifier for mobile devices
Motilin-like peptide compound having transmucosal absorbability imparted thereto
Controller for soldering iron
Measurement of an analyte on the skin using a hue angle
  Randomly Featured Patents
Device for controlling multiple transactions contending concurrently for the same resource in a distributed database system
Electronics assembly
Fluid filter having separable elements and removable end closures
CVD reactor
System and method for triggering actions at a host computer by telephone
Electric shaver
Reciprocating thread cutter for multi-needle looper thread type sewing machine
Thin film intagliated phosphor screen structure
Desk tray
Variable-displacement screw-type compressor