摘要:
A clock and data recovery circuit is provided that includes a phase/frequency detector to receive input data and multiphase clock signals. The phase/frequency detector including a first set of flip-flop circuits each to sample the input data at one of the multiphase clock signals and each to output a sampled data, and a second set of flip-flop circuits to retime the sampled data based on a similar clock signal applied to each of the second set of flip-flop circuits.
摘要:
A converter includes an input circuit to receive a single-ended input signal to generate a number of control signals. The control signals have a delay different from one another relative to the single-ended input signal. The converter also includes a first output circuit and a second output circuit. The first output circuit responds to the control signals to generate a first output signal. The second output circuit responds to the control signals to generate a second output signal. The first and second output signals are non-overlapping and form a complimentary signal pair.
摘要:
A light-emitting device and optical communication system based on the light-emitting device is disclosed. The light-emitting device is formed in a float-zone substrate. The light-emitting device includes on the substrate lower surface a reflective layer and on the upper surface spaced apart doped regions. The portion of the upper surface between the doped regions is textured and optionally covered with an antireflection coating to enhance light emission. The light-emitting device can operate as a laser or as a light-emitting diode, depending on the reflectivities of the antireflection coating and the reflective layer.
摘要:
A transformer is provided that includes a plurality of metal lines and a magnetic material provided about the plurality of metal lines. The magnetic material may include a structure to reduce Eddy currents flowing in the magnetic material. This structure may be a plurality of slots extending perpendicular to the metal lines. This structure may also be a laminated structure.
摘要:
A latch includes a memory unit, a transfer unit, an inversion unit, and an output unit. The Memory unit includes a number of storage nodes. The transfer unit transfers a data from a data input node to the storage nodes via a plurality of data paths. Each of the data paths includes a pass element controlled by a pulse. The inversion unit inverts the data before the data is transferred from the data input node to at least one of the storage nodes. The output unit outputs the data from the memory unit to a latch output node. The memory unit, the transfer unit, the inversion unit, and the output unit of the latch form a soft-error rate hardened latch structure with a reduced number of elements and reduced power consumption.
摘要:
A system and method for sampling a data stream generates a number of clock signals having equally spaced phases and then samples a data stream using the clock signals. The clock phases are preferably based on a predetermined fraction of a data rate frequency of the data stream, and sampling is performed based on predetermined combinations of the clock signals. While the system and method is suitable for sampling data transmitted for a wide variety of data rates, the system and method is especially well-suited to sampling at data transmitted at high rates, for example, equal to or greater than 20 Gb/s.
摘要:
A transimpedance amplifier having a first input port to connect to a signal source having an output impedance, and a second input port loaded by an impedance matched to the output impedance of the signal source, the amplifier comprising three stage pairs. The first stage pair comprises two inverting amplifiers, each employing negative feedback. The second stage pair comprises two inverting amplifiers with cross-coupled negative feedback. The third stage pair is similar in structure to the first stage pair. The inverter amplifiers in the third stage pair provide the differential voltage.
摘要:
A high bandwidth, single stage, low power cascode transimpedance amplifier for short haul optical links. In one embodiment, an input signal is fed into the source of a common-gate pMOSFET, the output signal is taken at the drain of the common-gate pMOSFET, and bias current is supplied by a pMOSFET and a nMOSFET biased in their triode regions.
摘要:
A latch includes a pair of inverters cross-coupled between a storage node and a feedback node. A capacitor is conditionally coupled to the feedback node through a pass gate such that the capacitor is coupled to the feedback node when the latch holds data and is not coupled to the feedback node when the latch is loading. The capacitor reduces the latch's susceptibility to soft errors when holding data, and does not appreciably slow the latch when data is loading. The capacitor is implemented using the gate capacitance of complementary transistors. A flip-flop includes cascaded latches, one or more of which have a switched capacitor on a feedback node.
摘要:
Methods, apparatus, systems, and articles of manufacture providing a Bayesian compute unit with reconfigurable sampler and methods and apparatus to operate the same are disclosed. An example apparatus includes a processor element to generate (a) a first element by applying a mean value to an activation and (b) a second element by applying a variance value to a square of the activation, the mean value and the variance value corresponding to a single probability distribution; a programmable sampling unit to: generate a pseudo random number; and generate an output based on the pseudo random number, the first element, and the second element, wherein the output corresponds to the single probability distribution; and output memory to store the output.