摘要:
A Twinax cable include a first axial cable having an inner diameter portion and an outer diameter portion and including a conductor surrounded by a dielectric material. A second axial cable has an inner diameter portion and an outer diameter portion and including a conductor surrounded by a dielectric material, the second axial cable being arranged such that a portion of the inner diameter thereof contacts the inner diameter portion of the first axial cable. A drain conductor is disposed between at least a portion of the inner diameter portion of the first axial cable and the inner diameter portion of the second axial cable. In addition, the a first foil layer contacts at least a portion of the outer diameter portion of the first axial cable and a second foil layer contacts at least a portion of the outer diameter portion of the second axial cable. An outer foil layer surrounds the first ax cable, the second axial cable, the first foil layer and the second foil layer.
摘要:
A cable for high speed data communications and methods for manufacturing such cable are disclosed, the cable including a first inner conductor enclosed by a first dielectric layer and a second inner conductor enclosed by a second dielectric layer. The cable also includes conductive shield material wrapped in a rotational direction at a rate along and about the longitudinal axis around the inner conductors and the dielectric layers, including overlapped wraps of the conductive shield material along and about the longitudinal axis, the conductive shield material having a variable width. Transmitting signals on the cable including transmitting a balanced signal characterized by a frequency in the range of 7-9 gigahertz on the cable.
摘要:
The invention is directed to an on-chip probing apparatus. In accordance with an embodiment of the present invention, the on-chip probing apparatus includes: a plurality of switches on a chip; a plurality of externally accessible probe points on the chip; and a multiplexer for controlling the plurality of switches to selectively couple an output signal of the chip to one of the plurality of probe points.
摘要:
Embodiments of the present invention address deficiencies of the art in respect to via structure utilization in a PCB design and provide a novel and non-obvious method, system and computer program product for impedance discontinuity remediation for via stubs and connectors in a PCB. In one embodiment a method for impedance discontinuity remediation in a PCB can be provided. The method can include configuring a pre-distortion filter to negate an impedance discontinuity in an electrical signal caused by a transmission line with one of a via stub or a connector. The method further can include pre-distortion filtering an electrical signal before transmitting the electrical signal over the transmission line. Finally, the method can include transmitting the pre-distortion filtered electrical signal over the transmission line.
摘要:
A cable for high speed data communications and methods for manufacturing such cable are disclosed, the cable including a first inner conductor enclosed by a first dielectric layer and a second inner conductor enclosed by a second dielectric layer. The cable also includes conductive shield material wrapped in a rotational direction at a rate along and about the longitudinal axis around the inner conductors and the dielectric layers, including overlapped wraps of the conductive shield material along and about the longitudinal axis, the conductive shield material having a variable width. Transmitting signals on the cable including transmitting a balanced signal characterized by a frequency in the range of 7-9 gigahertz on the cable.
摘要:
A cable for high speed data communications and methods for manufacturing such cable are disclosed, the cable including a first inner conductor enclosed by a first dielectric layer and a second inner conductor enclosed by a second dielectric layer. The cable also includes conductive shield material wrapped in a rotational direction at a rate along and about the longitudinal axis around the inner conductors and the dielectric layers, including overlapped wraps of the conductive shield material along and about the longitudinal axis, the conductive shield material having a variable width. Transmitting signals on the cable including transmitting a balanced signal characterized by a frequency in the range of 7-9 gigahertz on the cable.
摘要:
The key limiter in a multi-drop system, such as a multi-drop memory system, is the super-positioning of reflection noise from multiple modules or pluggable units, such as DIMMs. Using the noise cancellation approach of the present invention, the noise is distributed across the width of the pulse thus significantly reducing the impact of noise super-positioning. Use of the system of the present invention provides improved noise margins and is a key enabler of high performance, high speed bus, particularly at higher bit rates, as well as an enabler for higher capacity modules, such as DIMMs. The system provides for electrical traces from each of the modules of varying lengths thereby distributing the noise reflections.
摘要:
The present invention assesses memory (DIMM) strength by calculating frequency content of a radiated field which is collected by an apparatus, such as a dipole antenna. Radiated field is created by accelerated charge, which is a function of the slew rate or DIMM strength. Radiated power is directly proportional to the frequency at which bits are driven. By separating the radiated field from the near field or stored field, the DIMM strength content is isolated from other functional DIMM issues, such as tRCD latency, refresh cycles, addressing mode, etc. By examining the radiated power, the disadvantages of the prior art, such as by probing the DIMM's contacts, are avoided.
摘要:
The present invention provides a simple, easy to implement method and apparatus to reduce jitter in a channel and expand the eye width and eye height of the eye pattern of the signal. The method and apparatus of the present invention reduces jitter specific to a channel in a high speed interface. The present invention utilizes a phasing shifting mechanism based on history of the incoming bits at the receiver. The input bits from the channel are shifted in time before getting to the receiver. This approach significantly reduces Intersymbol Interference (ISI) and deterministic jitter, thus opening up the eye width and eye height for a given interface.
摘要:
A cable for high speed data communications and methods for manufacturing such cable are disclosed, the cable including a first inner conductor enclosed by a first dielectric layer and a second inner conductor enclosed by a second dielectric layer. The cable also includes conductive shield material wrapped in a rotational direction at a rate along and about the longitudinal axis around the inner conductors and the dielectric layers, including overlapped wraps of the conductive shield material along and about the longitudinal axis, the conductive shield material having a variable width. Transmitting signals on the cable including transmitting a balanced signal characterized by a frequency in the range of 7-9 gigahertz on the cable.