Patents Assigned to Hathaway Instruments, Inc.
  • Patent number: 4134029
    Abstract: An analog signal delay system is provided with a bucket-brigade charge transfer device controlled by a clock which supplies pulses at a predetermined frequency to sample an analog signal at its input and to effect a predetermined delay between the signal at the input and the corresponding signal at the output. Analog signals are impressed on the input of the system and are sampled at a pulse rate which may be one-half the frequency of the clock pulses. Periodic calibration or correction pulses are supplied to the brigade device during the intervals between the sampling pulses of the analog signal. One or more amplifiers are provided between the output of the brigade device and the output of the system. In order to correct for D.C. drift errors and gain variations which may result from temperature changes, the correction pulses are compared to a reference to generate error signals which are fed to control circuits to correct the D.C. level and gain.
    Type: Grant
    Filed: April 29, 1977
    Date of Patent: January 9, 1979
    Assignee: Hathaway Instruments, Inc.
    Inventors: James A. Bright, Gene H. Clark