1
Charles Brian Cox, David Kent Bonds, Jay Jui Chieh Chen, Flaviu C Costescu, Joel Richard Dierks, Wayne Douglas Duello, Thomas L Frederick, Paul A Goud, Derek Stephen Hilborn, Richard Johnathan Hinkle, Terry Lee Hinkle, David E Jones, Theron Lee Jones, Patricia Fern Kavanagh, David W Kroeger, Robert Richard Leyendecker, Vladimir Pavlovic, Claudio Gustavo Rey, Ray M R Sewlochan, Emre Tapucu, Mark A Walker: Linear transmitter using predistortion. Glenayre Electronics, Christensen O Connor Johnson & Kindness PLLC, March 24, 1998: US05732333 (236 worldwide citation)

A linear transmitter (101) using predistortion includes a modulator (103), a predistorter (107), a digital quadrature modulator (111), an upconverter (113), a power amplifier (115), and an antenna (117). In addition, the transmitter (101) has a feedback loop including a coupler (119), a downconverte ...


2
Ky Thoai Luu, Wayne Douglas Duello, Douglas J Posey: Adaptive compensation for carrier signal phase distortion. Harris Corporation, Tarolli Sundheim Covell Tummino & Szabo L, September 4, 2001: US06285255 (11 worldwide citation)

Apparatus and method are presented for adaptively compensating for carrier signal phase distortion caused by amplitude modulating an RF carrier signal. A modulator-amplifier network receives an RF carrier signal and modulates it by a received amplitude varying signal to obtain therefrom a modulated ...


3
Ky Thoai Luu, Wayne Douglas Duello: Pulse width modulator circuit having negative bias. Harris Corporation, Tarolli Sundheim Covell & Tummino L, November 29, 2005: US06970051 (3 worldwide citation)

A pulse width modulator is presented herein and it includes a pulse width driver circuit that receives a time varying ramp signal that is modulated by a time varying analog input signal to produce a pulse width modulated drive signal comprised of turn-on pulses having widths that vary with variation ...


4
George Cabrera, Timothy Wilfred Dittmer, Wayne Douglas Duello: Dual output digital exciter. Harris Corporation, Tarolli Sundheim Covell & Tummino, November 24, 2009: US07623833 (2 worldwide citation)

Systems and methods are provided for generating dual outputs in a digital exciter system. A first signal path produces one of a frequency modulated audio signal, a digital information signal, and a signal comprising both frequency modulated audio and digital information. A second signal path produce ...


5
Wayne Douglas Duello, Ky Thoai Luu, Carlos Abascal, Anders S Mattsson: Digitally adaptive modulated transmitter. Harris Corporation, Tarolli Sundheim Covell & Tummino L, April 25, 2006: US07035600 (1 worldwide citation)

A circuit for use in a broadcast transmitter for adaptively compensating for carrier signal distortions caused by amplitude modulating an RF carrier signal. The circuit includes a modulator/amplifier network that receives an RF carrier signal and modulates it by a received amplitude varying signal t ...


6
Wayne Douglas Duello, Scott Frederick Halozan: Digital exciter having pilot signal compensation. Harris Corporation, Tarolli Sundheim Covell & Tummino, May 21, 2013: US08446992

A digital exciter is presented herein for use in RF broadcasting and wherein the exciter employs pilot signal compensation. This includes an input digital circuit for receiving a modulated digital data at an input sample rate for RF broadcasting at a desired RF frequency. The pilot frequency may be ...


7
Wayne Douglas Duello, Ky Thoai Luu, Carlos Abascal, Anders S Mattsson: Digitally adaptive modulated transmitter. Harris Corporation, Tarolli Sundheim Covell & Tummino, December 23, 2004: US20040259509-A1

A circuit for use in a broadcast transmitter for adaptively compensating for carrier signal distortions caused by amplitude modulating an RF carrier signal. The circuit includes a modulator/amplifier network that receives an RF carrier signal and modulates it by a received amplitude varying signal t ...


8
Anders S Mattsson, Carlos Abascal, Wayne Douglas Duello, Ky Thoai Luu: Precorrection of nonlinear distortion with memory. Harris Corporation, Tarolli Sundheim Covell & Tummino, December 23, 2004: US20040258176-A1

A system and method are provided for providing nonlinear precorrection to an input signal. A plurality of nonlinear function blocks each receive a constituent signal, derived from the input signal. Each constituent signal has an associated value and an associated delay. The nonlinear function blocks ...


9
Ky Thoai Luu, Wayne Douglas Duello: Pulse width modulator circuit having negative bias. Harris Corporation, Tarolli Sundheim Covell & Tummino, June 9, 2005: US20050122183-A1

A pulse width modulator is presented herein and it includes a pulse width driver circuit that receives a time varying ramp signal that is modulated by a time varying analog input signal to produce a pulse width modulated drive signal comprised of turn-on pulses having widths that vary with variation ...


10
George Cabrera, Timothy Wilfred Dittmer, Wayne Douglas Duello: Dual output digital exciter. Harris Corporation, Tarolli Sundheim Covell & Tummino, October 18, 2007: US20070243836-A1

Systems and methods are provided for generating dual outputs in a digital exciter system. A first signal path produces one of a frequency modulated audio signal, a digital information signal, and a signal comprising both frequency modulated audio and digital information. A second signal path produce ...



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