摘要:
A computer implemented method, testing system, computer usable program code, and apparatus are provided for measuring microprocessor susceptibility to internal noise A noise generator modulates a clock signal to generate noise on a targeted component within a microprocessor. A function generator executes microprocessor functions on a plurality of functional components within the microprocessor. A maximum execution frequency on the plurality of functional components is then measured and a set of frequency ranges where the functional components are susceptible to the generated noise is determined.
摘要:
A system and method of integrated circuit control for in situ impedance measurement including a system with a plurality of functional partitions in a clocked logic type integrated circuit, the functional partitions having a communication controller and a modulation gate, the modulation gate receiving a clock signal and a modulation signal and generating a modulated clock signal for the functional partition; at least one of the communication controllers receiving an in-band signal and selectively communicating the in-band signal to the other communication controllers; and at least one of the functional partitions having a modulator, the modulator receiving the clock signal and a modulation control signal and generating the modulation signal.
摘要:
A first selection of mesh line segments of a mesh layer are of a first width and a second selection of mesh line segments of the mesh layer are of a second width, wherein the second width is greater than the first width. The second selection of mesh line segments of the second width are positioned in parallel to a selection of signal lines in a signal layer that are likely to introduce crosstalk, wherein the widening of the mesh line segments shadowing the selection of signal lines increases the likelihood that the return current associated with the signal will flow in the wider mesh line segment, thereby increasing the likelihood of containing the electromagnetic fields associated with the signal such that crosstalk to other signals is reduced or contained.
摘要:
A method, a system and a computer program product for reducing coupling noise in low loss on-module wires used for connecting module components in electrical circuits/devices. During the design stage, an Enhanced Crosstalk Reduction (ECR) utility identifies interconnect wires as driven/aggressor traces or receiver traces. The ECR utility substantially avoids forward crosstalk in a victim trace by specially arranging driver traces adjacent to the receiver victim trace in order to provide a lower level and saturated level of backward crosstalk. In particular, the ECR utility provided a configuration of wire/trace layers based on one or more of: (a) the crosstalk impact of a trace when positioned in a particular location; (b) the crosstalk impact of the trace upon remaining components based on placement in the particular location; and (c) system component specifications. In addition, the ECR utility reduces crosstalk by providing a configuration of receiver wires and transmitter wires without the use of isolation layers.
摘要:
Manufacturing circuits with reference plane voids over vias with a strip segment interconnect permits routing critical signal paths over vias, while increasing via insertion capacitance only slightly. The transmission line reference plane defines voids above (or below) signal-bearing plated-through holes (PTHs) that pass through a rigid substrate core, so that the signals are not degraded by an impedance mismatch that would otherwise be caused by shunt capacitance from the top (or bottom) of the signal-bearing PTHs to the transmission line reference plane. In order to provide increased routing density, signal paths are routed over the voids, but disruption of the signal paths by the voids is prevented by including a conductive strip through the voids that reduces the coupling to the signal-bearing PTHs and maintains the impedance of the signal path conductor.
摘要:
A first selection of mesh line segments of a mesh layer are of a first width and a second selection of mesh line segments of the mesh layer are of a second width, wherein the second width is greater than the first width. The second selection of mesh line segments of the second width are positioned in parallel to a selection of signal lines in a signal layer that are likely to introduce crosstalk, wherein the widening of the mesh line segments shadowing the selection of signal lines increases the likelihood that the return current associated with the signal will flow in the wider mesh line segment, thereby increasing the likelihood of containing the electromagnetic fields associated with the signal such that crosstalk to other signals is reduced or contained.
摘要:
A device may include a current source for connecting to a printed circuit board. The device may also include a first FET switch pack and a second FET switch pack for connecting to the surface mount connector of the printed circuit board. Additionally, the device may include a FET controller connected to the first FET switch pack and the second FET switch pack. The FET controller may be utilized for connecting a first FET and a second FET to the first region of the surface mount connector. The FET controller may be configured for supplying the current to the first region of the surface mount connector to produce at least one continuous heat signature characteristic of an improperly connected ground pin. A thermal monitoring module may be used to identify the improper physical connection.
摘要:
Manufacturing circuits with reference plane voids over vias with a strip segment interconnect permits routing critical signal paths over vias, while increasing via insertion capacitance only slightly. The transmission line reference plane defines voids above (or below) signal-bearing plated-through holes (PTHs) that pass through a rigid substrate core, so that the signals are not degraded by an impedance mismatch that would otherwise be caused by shunt capacitance from the top (or bottom) of the signal-bearing PTHs to the transmission line reference plane. In order to provide increased routing density, signal paths are routed over the voids, but disruption of the signal paths by the voids is prevented by including a conductive strip through the voids that reduces the coupling to the signal-bearing PTHs and maintains the impedance of the signal path conductor.
摘要:
A device may include a current source for connecting to a printed circuit board. The device may also include a first FET switch pack and a second FET switch pack for connecting to the surface mount connector of the printed circuit board. Additionally, the device may include a FET controller connected to the first FET switch pack and the second FET switch pack. The FET controller may be utilized for connecting a first FET and a second FET to the first region of the surface mount connector. The FET controller may be configured for supplying the current to the first region of the surface mount connector to produce at least one continuous heat signature characteristic of an improperly connected ground pin. A thermal monitoring module may be used to identify the improper physical connection.
摘要:
A system and method for reducing noise in a multi-layer ceramic package are provided. With the system and method, additional shielding wires are inserted into the reference planes wherever there are no signal vias present. These additional lines in the reference planes force stronger signal interaction with the reference (vdd/gnd) thereby reducing the interaction between the signals in the signal layers. As a result, the noise present in the signals of the signal layers is reduced.