Patents by Inventor Donald E. Parreco
Donald E. Parreco 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).
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Patent number: 8810729Abstract: A method and apparatus for automatic compensation of insertion loss in signals transmitted over conductors is presented. The present invention is particularly applicable to the transmission of signals over long lengths of CAT-5 or similar twisted-pair cables. A reference signal having a known form and strength (e.g. a pulse signal) is provided to each pair of conductors carrying a component of a signal from a transmitter to a receiver. The receiver includes adjustable gain amplifiers for each conductor pair over which a component of the signal is transmitted. The gains of the amplifiers are initially set at an initial level (e.g., their maximum gain) to allow detection of the reference signal. Once the reference signal is detected in a conductor pair, the amplifier gains are adjusted such that the level of the reference signal is restored approximately to its original form and strength.Type: GrantFiled: December 11, 2012Date of Patent: August 19, 2014Assignee: RGB Systems, Inc.Inventors: Raymond William Hall, Donald E Parreco
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Publication number: 20140055680Abstract: A method and apparatus for automatic compensation of insertion loss in signals transmitted over conductors is presented. The present invention is particularly applicable to the transmission of signals over long lengths of CAT-5 or similar twisted-pair cables. A reference signal having a known form and strength (e.g. a pulse signal) is provided to each pair of conductors carrying a component of a signal from a transmitter to a receiver. The receiver includes adjustable gain amplifiers for each conductor pair over which a component of the signal is transmitted. The gains of the amplifiers are initially set at an initial level (e.g., their maximum gain) to allow detection of the reference signal. Once the reference signal is detected in a conductor pair, the amplifier gains are adjusted such that the level of the reference signal is restored approximately to its original form and strength.Type: ApplicationFiled: December 11, 2012Publication date: February 27, 2014Applicant: RGB SYSTEMS, INC.Inventors: RAYMOND WILLIAM HALL, DONALD E. PARRECO
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Patent number: 8634028Abstract: A feedback circuit for restoration of DC in electrical signals is presented. A sample pulse representing a DC portion of an electrical signal is generated. The sample pulse triggers a sample and hold circuit to acquire the correct offset voltage in the electrical signal during this DC portion. The offset voltage feeds back through a summing node to the electrical signal thereby restoring the video signal to the desired DC voltage level with respect to ground.Type: GrantFiled: March 12, 2012Date of Patent: January 21, 2014Assignee: RGB Systems, Inc.Inventors: Raymond William Hall, Donald E Parreco
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Patent number: 8330550Abstract: A method and apparatus for automatic compensation of insertion loss in video signals transmitted over conductors is presented. The present invention is particularly applicable to the transmission of video over long lengths of CAT-5 or similar twisted-pair cables. A reference signal having a known form and strength (e.g. a pulse signal) is provided to each pair of conductors carrying a component of a video signal from a transmitter to a receiver. The receiver includes adjustable gain amplifiers for each conductor pair over which a component of the video signal is transmitted. The gains of the amplifiers are initially set at an initial level (e.g., their maximum gain) to allow detection of the reference signal. Once the reference signal is detected in a conductor pair, the amplifier gains are adjusted such that the level of the reference signal is restored approximately to its original form and strength.Type: GrantFiled: June 23, 2006Date of Patent: December 11, 2012Assignee: RGB Systems, Inc.Inventors: Raymond William Hall, Donald E Parreco
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Publication number: 20120194746Abstract: A feedback circuit for restoration of DC in electrical signals is presented. A sample pulse representing a DC portion of an electrical signal is generated. The sample pulse triggers a sample and hold circuit to acquire the correct offset voltage in the electrical signal during this DC portion. The offset voltage feeds back through a summing node to the electrical signal thereby restoring the video signal to the desired DC voltage level with respect to ground.Type: ApplicationFiled: March 12, 2012Publication date: August 2, 2012Applicant: RGB SYSTEMS, INC.Inventors: RAYMOND WILLIAM HALL, DONALD E. PARRECO
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Patent number: 8154664Abstract: A feedback circuit for restoration of DC in video signals is presented. A sample pulse representing the back porch of an incoming video signal is generated from the horizontal sync signal. The sample pulse triggers a sample and hold circuit to acquire the correct offset voltage in the output signal during this back porch period. The offset voltage feeds back through a summing node upstream of either the circuit causing the offset or an input amplifier thereby restoring the video signal to the desired DC voltage level with respect to ground.Type: GrantFiled: August 23, 2010Date of Patent: April 10, 2012Assignee: RGB Systems, Inc.Inventors: Raymond William Hall, Donald E. Parreco
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Publication number: 20110069236Abstract: A feedback circuit for restoration of DC in video signals is presented. A sample pulse representing the back porch of an incoming video signal is generated from the horizontal sync signal. The sample pulse triggers a sample and hold circuit to acquire the correct offset voltage in the output signal during this back porch period. The offset voltage feeds back through a summing node upstream of either the circuit causing the offset or an input amplifier thereby restoring the video signal to the desired DC voltage level with respect to ground.Type: ApplicationFiled: August 23, 2010Publication date: March 24, 2011Inventors: Raymond William Hall, Donald E. Parreco
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Patent number: 7787057Abstract: A feedback circuit for restoration of DC in video signals is presented. A sample pulse representing the back porch of an incoming video signal is generated from the horizontal sync signal. The sample pulse triggers a sample and hold circuit to acquire the correct offset voltage in the output signal during this back porch period. The offset voltage feeds back through a summing node upstream of either the circuit causing the offset or an input amplifier thereby restoring the video signal to the desired DC voltage level with respect to ground.Type: GrantFiled: August 22, 2006Date of Patent: August 31, 2010Assignee: RGB Systems, Inc.Inventors: Raymond William Hall, Donald E. Parreco
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Publication number: 20080106643Abstract: A system capable of transmitting and receiving high frequency video signals across various lengths of a twisted pair cable while maintaining video quality is presented. The system includes a transmitter and a receiver tandem coupled together over twisted pair cable. Each video component is mixed with a reference signal in the transmitter and driven differentially onto the twisted pair cable. Upon detection of a signal in the twisted pair cable, the receiver adjusts its internal gains until the known characteristic of the reference signal is achieved. The receiver than automatically adjusts the skew & DC offset. Thus, the receiver is able to automatically measure the degradation in video quality and appropriately compensate the video signals for the accumulated degradation caused primarily by the transmission between the transmitter and the receiver. The compensated video may subsequently be provided to a video display device.Type: ApplicationFiled: November 8, 2006Publication date: May 8, 2008Applicant: RGB SYSTEMS, INC.Inventors: RAYMOND WILLIAM HALL, GARY DEAN COLE, Donald E. Parreco
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Publication number: 20080062326Abstract: A feedback circuit for restoration of DC in video signals is presented. A sample pulse representing the back porch of an incoming video signal is generated from the horizontal sync signal. The sample pulse triggers a sample and hold circuit to acquire the correct offset voltage in the output signal during this back porch period. The offset voltage feeds back through a summing node upstream of either the circuit causing the offset or an input amplifier thereby restoring the video signal to the desired DC voltage level with respect to ground.Type: ApplicationFiled: August 22, 2006Publication date: March 13, 2008Applicant: RGB SYSTEMS, INC. (DBA EXTRON ELECTRONICS)Inventors: Raymond William Hall, Donald E. Parreco
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Publication number: 20070300284Abstract: A method and apparatus for automatic compensation of insertion loss in video signals transmitted over conductors is presented. The present invention is particularly applicable to the transmission of video over long lengths of CAT-5 or similar twisted-pair cables. A reference signal having a known form and strength (e.g. a pulse signal) is provided to each pair of conductors carrying a component of a video signal from a transmitter to a receiver. The receiver includes adjustable gain amplifiers for each conductor pair over which a component of the video signal is transmitted. The gains of the amplifiers are initially set at an initial level (e.g., their maximum gain) to allow detection of the reference signal. Once the reference signal is detected in a conductor pair, the amplifier gains are adjusted such that the level of the reference signal is restored approximately to its original form and strength.Type: ApplicationFiled: June 23, 2006Publication date: December 27, 2007Applicant: RGB SYSTEMS, INC., (DBA EXTRON ELECTRONICS)Inventors: Raymond William Hall, Donald E. Parreco