Patents Assigned to Aptek Technologies, Inc.
  • Circuit arrangement for preventing gain from responding to frequency variation despite the presence of an isolation transformer
    Patent number: 5038375
    Abstract: By the use of a feedback arrangement, deleterious circuit effects of an isolation transformer in a terminal device for a telephone line can be eliminated. By this arrangement, a smaller, cheaper transformer may be used. A terminal device employing such arrangement can present a balanced termination to a telephone line, exhibit a known and controlled impedance to that line and provide for signals to be coupled to and from that line.
    Type: Grant
    Filed: June 23, 1989
    Date of Patent: August 6, 1991
    Assignee: Aptek Technologies, Inc.
    Inventor: Howard Sinberg