Patents Assigned to Toric Limited
  • Anti-jitter circuits
    Patent number: 6791393
    Abstract: An anti-jitter circuit has an integrator storage capacitor. A charge pump derives from an input pulse train at least one charge packet during each cycle of the input pulse train and supplies the charge packets to the storage capacitor. A controlled current sink operating in conjunction with a high impedance low pass filter continuously discharges the storage capacitor to create a sawtooth voltage waveform having a mean d.c. voltage level. A differential comparator compares the sawtooth voltage waveform with the mean d.c.
    Type: Grant
    Filed: August 1, 2001
    Date of Patent: September 14, 2004
    Assignee: Toric Limited
    Inventor: Michael James Underhill
  • Noise reduction circuits
    Patent number: 6417707
    Abstract: A noise reduction circuit useful as a clock restoration circuit includes a DC removal circuit for removing a DC level from an input pulse train, an integrator for integrating the input pulse train after a DC level has been removed, a comparator for comparing the integrator output with a threshold value (Vmp) to detect for a missing pulse, a pulse generator inserting into the input pulse train an additional pulse delayed with respect to any missing pulse, and an output circuit for generating an output pulse train from the integrator output.
    Type: Grant
    Filed: February 3, 2000
    Date of Patent: July 9, 2002
    Assignee: Toric Limited
    Inventors: Michael James Underhill, Neil Alexander Downie