Patents by Inventor Tadashi Sonobe

Tadashi Sonobe 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).

  • Signal isolating and sampling circuit
    Patent number: 4068135
    Abstract: A signal isolating and sampling circuit using a transformer to isolate a signal input circuit from a signal output circuit. Signal sampling switches are used in the input and output circuits to sample an input signal applied to the input circuit. A photocoupler is provided for coupling a switch selecting signal to the sampling switch in the input circuit while an energizing signal for driving the sampling switch in the input circuit is supplied through the transformer from an energizing signal source connected to the signal output circuit. The energizing signal is rectified in the signal input circuit and used to drive the signal input circuit sampling switch under control of the switch selecting signal.
    Type: Grant
    Filed: November 16, 1976
    Date of Patent: January 10, 1978
    Assignee: Honeywell Inc.
    Inventors: Tadashi Sonobe, Seiji Onoki