摘要:
A serializer-deserializer instantiated in configurable logic of an integrated circuit is described. The serializer-deserializer includes an input deserializer and an output serializer, which may be commonly coupled via an input/output pad. Each of the serializer and deserializer may be configured for an operating mode selected from a Single Data Rate mode and a Double Data Rate mode. The serializer-deserializer may be used as part of a synchronous interface.
摘要:
A method and apparatus to reduce the degradation in performance of semiconductor-based devices due to process, voltage, and temperature (PVT) and/or other causes of variation. Adaptive feedback mechanisms are employed to sense and correct performance degradation, while simultaneously facilitating configurability within integrated circuits (ICs) such as programmable logic devices (PLDs). A voltage-feedback mechanism is employed to detect PVT variation and mirrored current references are adaptively adjusted to track and substantially eliminate the PVT variation. More than one voltage-feedback mechanism may instead be utilized to detect PVT-based variations within a differential device, whereby a first voltage-feedback mechanism is utilized to detect common-mode voltage variation and a second voltage-feedback mechanism produces mirrored reference currents to substantially remove the common-mode voltage variation and facilitate symmetrical operation of the differential device.
摘要:
A system for signal level shifting in an IC can include a first inverter having a first pull-up device and a pull-down device, wherein the first inverter is operable to receive an input signal having a voltage potential at a logic high that does not disable the first pull-up device. The system can include a second inverter coupled in series to an output of the first inverter, and a control module coupled to the output of the first inverter and an output of the second inverter. Prior to the input signal transitioning to the logic high, the control module is operable to decouple the input signal from the first pull-up device, disable the first pull-up device, and close a feedback loop that latches an output state of the second inverter.
摘要:
An input/output (I/O) structure includes a delay element usable for the input path, the output path, or both input and output paths in a user design. In a first mode, the delay element is included in the input path. In a second mode, the delay element is included in the output path. In a third mode, the I/O structure includes the delay in both outgoing signal paths and incoming signal paths, e.g., by utilizing an output tristate signal to control the direction of the delay line. When the output buffer is driving, the delay is inserted in the output path. When the output buffer is tristated, the delay is inserted in the input path. Thus, a single delay element is dynamically shared by both input and output signals that use the same I/O pad. In an optional fourth mode, the delay element is bypassed by both input and output signals.
摘要:
A high-speed, area-efficient level shifter includes transistors having a variety of oxide thicknesses. The level shifter has a protection circuit stage, and a current mirror stage that allows the level shifter to perform over a wide voltage range at a high frequency. The level shifter maintains rise time, fall time, and duty cycle over a wide range of input and output voltage levels.
摘要:
Calcium-phosphate nanofiber matrices comprising randomly dispersed crystalline calcium-phosphate nanofibers are provided. The nanofibers are synthesized using sol-gel methods combined with electrospinning. The nanofibers may be hollow, solid or may comprise a calcium-phosphate shell surrounding a polymer containing inner core to which biologically functional additives may be added. The nanofiber matrices may be used to culture bone and dental cells, and as implants to treat bone, dental or periodontal diseases and defects.
摘要:
Low amidine content poly(N-vinylformamide-co-vinylamine) (PVAm), is described, as well as processes of making and providing same in fresh or aged formats, and the usage of such polymer to increase papermaking retention and drainage rate and enhance paper dry strength, and other applications.
摘要:
In one embodiment, an integrated circuit (IC) is presented. The IC includes first and second sets of power distribution lines formed in the IC. The IC includes first and second capacitors formed in one or more layers of the IC. A first plurality of vias couple a first input of the first and second capacitors to the first set of power distribution lines, and a second plurality of vias couple a second input of the first and second capacitors to the second set of power distribution lines. The first capacitor and the first plurality of vias and the second plurality of vias coupled thereto having an equivalent series resistance greater than an equivalent series resistance of the second capacitor and the first plurality of vias and the second plurality of vias coupled thereto.
摘要:
In one embodiment, an integrated circuit (IC) is presented. The IC includes first and second sets of power distribution lines formed in the IC. The IC includes first and second capacitors formed in one or more layers of the IC. A first plurality of vias couple a first input of the first and second capacitors to the first set of power distribution lines, and a second plurality of vias couple a second input of the first and second capacitors to the second set of power distribution lines. The first capacitor and the first plurality of vias and the second plurality of vias coupled thereto having an equivalent series resistance greater than an equivalent series resistance of the second capacitor and the first plurality of vias and the second plurality of vias coupled thereto.
摘要:
Low amidine content poly(N-vinylformamide-co-vinylamine) (PVAm), is described, as well as processes of making and providing same in fresh or aged formats, and the usage of such polymer to increase papermaking retention and drainage rate and enhance paper dry strength, and other applications.