Joseph W. Yates - Duluth GA Michael S. Cosson - Duluth GA
Assignee:
AT&T Global Information Solutions Company - Dayton OH
International Classification:
H01L 2700 H03B 100
US Classification:
331 74
Abstract:
A circuit and method for minimizing electromagnetic emissions which employ a cancellation signal to produce electromagnetic fields which are opposites of the fields produced by the digital circuit. The circuit and method of the present invention are particularly suited for use in digital systems which produce constant-frequency and constant-amplitude clock signals for driving a circuit load. The circuit includes a cancellation circuit for producing the cancellation signal, which may include the same oscillator used to produce the clock signal. An amplitude-adjust circuit adjusts the amplitude of the cancellation signal, and a phase-adjust circuit adjusts the phase of the cancellation signal.
Systems And Methods For Transmitting And Receiving Broadcast Data
Douglas Sup Yoon - Johns Creek GA, US Michael Stirling Cosson - Flowery Branch GA, US
International Classification:
H04L 29/06
Abstract:
Systems and methods for transmitting and receiving broadcast data are disclosed. In one embodiment, a system includes a modulator configured to receive a stream of Ethernet packets and modulate the stream of Ethernet packets to produce a baseband signal, where each Ethernet data packet includes broadcast data that is encapsulated in a IP/UDP packet. The system can also include an upconverter configured to upconvert the baseband signal to a transmission frequency, and a transmitter configured to transmit the upconverted signal.