Patents Assigned to Compagnie Industrielle des Telecommunications S.A.
  • Chopper including transistor switches
    Patent number: 4118641
    Abstract: A chopper having four transistor switches and driven by an AC reference signal provides an alternating output signal. During each half period of the reference signal two of the transistor switches are nonconductive, one is conductive and the fourth commutates at a frequency representative of the error between the reference signal amplitude and a predetermined proportion of the output signal amplitude. Conduction losses are minimized.
    Type: Grant
    Filed: March 8, 1977
    Date of Patent: October 3, 1978
    Assignee: Compagnie Industrielle des Telecommunications S.A.
    Inventor: Roger Lannuzel