Patents Assigned to RTS Systems, Inc.
  • Bilateral current source for a multi-terminal intercom
    Patent number: 4358644
    Abstract: A bilateral current source operates as a two-wire to four-wire converter circuit for an intercom system. The circuit provides a high impedance current driver for putting a local voice signal on the common line connecting the intercom stations. The same circuit acts as a buffer amplifier for connecting voice signals received on the same line to a listening device such as a speaker. The circuit suppresses any sidetones by preventing the local voice signal from being coupled to the listening device.
    Type: Grant
    Filed: June 17, 1980
    Date of Patent: November 9, 1982
    Assignee: RTS Systems, Inc.
    Inventor: Stanley L. Hubler