Patents Examined by James Tuo
  • Clamp system used for television signal
    Patent number: 5008753
    Abstract: A clamp system for television signal comprises a first clamp device for clamping to a clamp control voltage supplied from an external source by a horizontal clamp pulse and a second clamp device for controlling the DC potential of the television signal by adding the externally-supplied control voltage to an input television signal. The first clamp device is used during the period requiring an early clamp start, and the second clamp device is operated under normal conditions.
    Type: Grant
    Filed: February 23, 1989
    Date of Patent: April 16, 1991
    Assignees: Matsushita Electric Industrial Co., Nippon Hoso Kyokai
    Inventors: Hiromu Kitaura, Mitsuo Isobe, Isao Kawahara, Yoshio Hirauchi, Yuichi Ninomiya, Yoshimichi Ohtsuka, Yoshinori Izumi