1
Robert C Davis, Robert W Boyd: Adaptive predistortion technique for linearizing a power amplifier for digital data systems. Harris Corporation, Craig and Antonelli, September 22, 1981: US04291277 (138 worldwide citation)

Distortion introduced into a multiamplitude signal format by a high power microwave amplifier is compensated by a system which adapts itself to non-linearities present in the amplifier and predistorts the input signals before they are subjected to the non-linearities created by the amplifier. The de ...


2
Robert C Davis: Nonlinear equalizer for correcting intersymbol interference in a digital data transmission system. Harris Corporation, Antonelli Terry & Wands, August 28, 1984: US04468786 (40 worldwide citation)

A non-linear equalizer corrects for intersymbol interference in a digital data transmission system by introducing baud rate samples into an N-stage tapped delay line and provision is made for storing a sequence of M prior decisions in a prior decision register. Both the samples from the tapped delay ...


3
Robert C Davis, Steven E Curd, Gregory L Breedlove, Allan H Colen, Louis P Armstrong: Computerized video imaging system. Bremson Data Systems, Litman Day & McMahon, April 15, 1986: US04583186 (39 worldwide citation)

A computerized video imaging system is provided which includes a target mount for supporting a target photographic transparency. A lamphouse is positioned to pass light through the transparency and includes light sources for a set of primary colors. An image sensor is positioned to receive light pas ...


4
Edwin Ray Twitchell, Robert C Davis: Adaptive pre-distortion apparatus for linearizing an amplifier output within a data transmission system. Harris Corporation, Tarolli Sundheim Covell Tummino & Szabo, June 27, 2000: US06081158 (36 worldwide citation)

An adaptive apparatus for compensating the non-linear distorting action of an amplifier in a transmission system. I-channel and Q-channel memories store a plurality of digital pre-distortion correction values. The memories are addressed using a predetermined number of significant bits of an incoming ...


5
Robert C Davis: Printer with traversing lens and printing method. Litman McMahon & Brown, April 12, 1988: US04737825 (35 worldwide citation)

A printer includes a light source, a film carrier and a print paper support. A lens turret is mounted between the film carrier and the print paper support and is rotatable about a rotational axis. The lens turret is transversely movable with respect to the path of movement of the print paper whereby ...


6
Robert C Davis, Gautam H Thaker: Adaptive equalizer capable of linear and nonlinear weighting. Harris Corporation, Antonelli Terry & Wands, March 6, 1984: US04435823 (33 worldwide citation)

Equalizers are commonly used in digital data signaling systems to reduce the effects of intersymbol interference on a signal received over a transmission channel. However, conventional equalizers are relatively slow due to their use of multipliers. Also, generally such equalizers are limited to prov ...


7
Robert C Davis: Error correction coding method and apparatus for multilevel signaling. Harris Corporation, Craig and Antonelli, August 24, 1982: US04346473 (31 worldwide citation)

In typical error correction coding techniques for use in multilevel signalling schemes, such as M-level QAM signalling, the full data stream is encoded. In order to eliminate the need for such extensive coding while still allowing for accurate decisions as to the received data, the present system an ...


8
Kishore N Vora, Donald N Campbell, Robert C Davis Jr, Glenn E Spangler, Julio A Reategui: Selective ionization of gas constituents using electrolytic reactions. Allied Signal, Howard G Massung, Robert M Trepp, Leonard Bloom, June 13, 1989: US04839143 (30 worldwide citation)

An ion mobility spectrometer, ionization detector and mass spectrometer is described having a reaction region, and means for introducing a sample gas, liquid or solid samples into the reaction region and an electrolyte in the reaction region of an alkali salt heated to a predetermined temperature, s ...


9
Robert C Davis: Camera tripod rotating head. Gordon K Anderson, January 31, 2006: US06991384 (29 worldwide citation)

A camera tripod rotating head (20) is taught that is used for taking 360 degree photographic images with a camera (22) mounted on a tripod (24). The rotating head consists of an adapter base (26) that is configured to mate and attach to the camera tripod, and includes a one way roller clutch (30) mo ...


10
Kishore N Vora, Donald N Campbell, Robert C Davis Jr, Glenn E Spangler, Julio A Reategui: Selective ionization of gas constituents using electrolytic reactions. Environmental Technologies Group, Leonard Bloom, October 1, 1991: US05053343 (26 worldwide citation)

An ion mobility spectrometer, ionization detector and mass spectrometer is described having a reaction region, and a region for introducing a sample gas, liquid or solid samples into the reaction region and an electrolyte in the reaction region of an alkali salt heated to a predetermined temperature ...



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