Patents by Inventor Brian W. Dellande

Brian W. Dellande 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).

  • Interface circuit for interfacing between asynchronous data in start/stop format and synchronous data
    Patent number: 4569062
    Abstract: A data interface circuit for interfacing between an asynchronous data source providing data in start/stop format and a synchronous data communication channel is provided. The data interface circuit has a transmit portion and a receive portion which function independently. Upon receipt of asynchronous data, the transmit portion strips start and stop bits from the data and transmits the data in data frames of variable length characterized by beginning and ending with synchronizing idle codes. The synchronizing idle codes are transmitted in the absence of data to maintain synchronization. A code circuit insures that a data word is never the same as the idle code. Similarly, upon receipt of synchronous data and idle codes, the receive portion stores the data and controllably adds start and stop bits. Data in start/stop format is asynchronously provided at an output of the receive portion.
    Type: Grant
    Filed: June 28, 1984
    Date of Patent: February 4, 1986
    Inventors: Brian W. Dellande, Henry Wurzburg
  • Circuit for synchronizing the demodulation of phase modulated transmission bursts
    Patent number: 4458206
    Abstract: An energy synchronized demodulator circuit is disclosed having a differential input to single ended converter coupled to a sync detect circuit which provides a detection signal in response to the modulated input signal. The detection signal is integrated over time, and a threshold detector provides an output when the detection signal exceeds a predetermined threshold level. A filter provides a constant level output signal indicative of the presence of valid data. Synchronized demodulation is provided by a correlation between phase or frequency in predetermined bit intervals of the detection signal. Synchronization is initiated by the initial burst of input signal energy received by the differential input.
    Type: Grant
    Filed: December 21, 1981
    Date of Patent: July 3, 1984
    Assignee: Motorola, Inc.
    Inventors: Brian W. Dellande, Henry Wurzburg
  • Communication system having improved differential phase shift keying modulation
    Patent number: 4435824
    Abstract: A communication system which generates an output signal of a selected primary frequency having digital data bits serially modulated thereon by utilizing a hybrid differential phase shift keyed (DPSK) modulation is provided. The improved DPSK modulation is frequency modulation of a phase encoded signal. A controller controls frequency generator means which frequency shift the output signal between primary and secondary frequencies. The controller and frequency generator means provide a modulated output signal which is D.C. balanced bit by bit and has substantially reduced harmonic energy.
    Type: Grant
    Filed: May 20, 1982
    Date of Patent: March 6, 1984
    Assignee: Motorola, Inc.
    Inventors: Brian W. Dellande, Henry Wurzburg