Patents by Inventor Mark J. Halberstein

Mark J. Halberstein has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Dual threshold sensitive transistor turn-off circuit
    Patent number: 4754158
    Abstract: A DC coupled transistor turn-off circuit (12) responsive to a first DC voltage level for reverse driving the base of an output transistor (Q4), and responsive to a second DC voltage level for removing the reverse base drive. A turn-off transistor (Q5) is connected to the base (22) of the output transistor (Q4) for reverse driving it, and another transistor (Q6) is connected to the turn-off transistor (Q5) for turning it off. A pair of diodes (32, 34), each with different forward voltage drops, are connected between the respective bases of the turn-off circuit transistors (Q5, Q6) and a circuit input node (16). When the rising edge of the input voltage at such node reaches the first DC level, the first diode (32) conducts and activates the turn-off transistor (Q5) which reverse drives the base of the output transistor (Q4).
    Type: Grant
    Filed: May 28, 1985
    Date of Patent: June 28, 1988
    Assignee: Texas Instruments Incorporated
    Inventor: Mark J. Halberstein