Scientific-atlanta, Inc.

Cisco Technology, Inc.

Joel Paul Jenkins

William George Mahoney

Bart F Spriester

Sou-Pen Su

Jeffrey P Hughes

Joshua C Yi

Jaegyoo Seol

Leo Montreuil

Kinney Chapman Bacon

Jiening Ao

Alan J Schlenz

Larry Stephen McKinney

Some embodiments of the present invention may include a DPLL circuit comprising a firmware. The firmware may comprise a re-sampled NCO phase detector capable of receiving a reference clock timing signal and a VCXO clock timing signal. The re-sampled NCO phase detector may comprise a resampler capable of receiving phase output and the VCXO clock timing signal and resampling the phase output; and a subtractor capable of receiving the resampled phase output and subtracting the resampled phase output from a calculated mean value of the phase output. The firmware may further comprise a frequency detector capable of receiving the reference clock timing signal and the VCXO clock timing signal; and a multiplexer capable of switching between the re-sampled NCO phase detector and the frequency detector dependent upon a frequency lock status.

Switched phase and frequency detector based DPLL circuit with excellent wander and jitter performance and fast frequency acquisition

Systems and methods for decoding and processing back-to-back transactions for an addressable cable television tap. The addressable tap includes an input port for receiving an input signal and output ports for providing outgoing signals to receiving equipment and a controller for providing addressable per port (RF) switching. The controller is adapted to communicate with multiple addressable ports. The controller also includes storage for storing the remaining portions of partially processed commands. Further, the addressable tap includes a relay for enabling or disabling signals to the addressable output ports. Processing commands in the addressable tap includes receiving continuous commands having back-to-back transactions, from a headend and forwarding signals to receiving equipment. For a connect request, the addressable tap accepts the connect request as valid when, upon decoding each transaction, two consecutive transactions out of six are the same, and for a disconnect request, accepting the disconnect request as valid when, upon decoding each transaction, four consecutive transactions out of twelve transactions are the same.

Systems and methods of decoding and processing transactions for an addressable cable television tap

A communication system ( ) includes a tap ( ) that has an input port ( ) for receiving a signal and output ports ( ) coupled to the input port ( ) for providing the signal to subscriber equipment ( ). Each of the output ports ( ) has a programmed status comprising either an enabled status or a disabled status. After the statuses have been programmed and the output ports ( ) have been set, a controller ( ) coupled to the output ports ( ) periodically restores the programmed status of the output ports ( ) after programmed period of time, thereby automatically resetting inadvertent status changes.

Method and apparatus for restoring port status in a cable television tap

A bypass switch ( ) for use in an electronic device ( ) includes a substrate ( ) on which first, second, and third terminals ( ) are mounted and an electrically conductive primary element ( ), having first and second opposing ends, mounted to a bottom surface of the substrate ( ) and electrically coupled to the first terminal ( ) at its first end and to the second terminal ( ) at its second end. The switch ( ) also includes an electrically conductive bypass element ( ), having first and second opposing ends, mounted to the bottom surface of the substrate ( ) and electrically coupled to the third terminal ( ) at its first end and vertically aligned, at its second end, with the second end of the primary element ( ). A switch actuator ( ) is mechanically coupled to the bypass element ( ), extends through the substrate ( ), and has an actuating surface ( ) accessible at a top surface, opposite the bottom surface, of the substrate ( ). A downward force exerted upon the actuating surface ( ) of the actuator ( ) forces the second end of the bypass element ( ) away from the second end of the primary element ( ), thereby electrically decoupling the bypass element ( ) and the third terminal ( ) from the first and second terminals ( ).

Bypass device for amplifier

A bypass switch (,) for use in an electronic device (,) includes a substrate (,) on which first, second, and third terminals (,) are mounted and an electrically conductive primary element (,), having first and second opposing ends, mounted to a bottom surface of the substrate (,) and electrically coupled to the first terminal (,) at its first end and to the second terminal (,) at its second end. The switch (,) also includes an electrically conductive bypass element (,), having first and second opposing ends, mounted to the bottom surface of the substrate (,) and electrically coupled to the third terminal (,) at its first end and vertically aligned, at its second end, with the second end of the primary element (,). A switch actuator (,) is mechanically coupled to the bypass element (,), extends through the substrate (,), and has an actuating surface (,) accessible at a top surface, opposite the bottom surface, of the substrate (,). A downward force exerted upon the actuating surface (,) of the actuator (,) forces the second end of the bypass element (,) away from the second end of the primary element (,), thereby electrically decoupling the bypass element (,) and the third terminal (,) from the first and second terminals (,).

Housing for a cable television tap

A tap (125) for use in a cable television system (100) includes an incoming port (202) for receiving an incoming signal from a head end section (105) and at least first and second outgoing subscriber ports (225, 230) for transmitting outgoing signals to system subscribers. The first and second subscriber ports (225, 230) can be enabled or disabled, depending upon whether cable service is to be provided from a particular port. The tap (125) also includes light sources (250, 260) located on the body of the tap (125) to indicate statuses, i.e., enabled or disabled, of the subscriber ports (225, 230).

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Lawrenceville, GA, United States of America

Joel Paul Jenkins