SELF-TEST DESIGN FOR SERIALIZER / DESERIALIZER TESTING
Granted: April 24, 2014
Application Number:
20140115409
Providing for testing of digital sequencing components of an integrated chip is described herein. By way of example, self-test procedures are provided for unidirectional integrated chips that have different sequence generation (e.g., transmission) and sequence monitoring (e.g., receiving) frequencies. A test logic component(s) can be added to an integrated chip to match the sequence generation frequency to the sequence monitoring frequency. This can facilitate self-testing of…
MANAGING BANKS IN A MEMORY SYSTEM
Granted: April 10, 2014
Application Number:
20140101380
Systems and methods are provided that facilitate memory storage in a memory device. The system contains a memory controller and a memory array communicatively coupled to the memory controller. The memory controller sends commands to the memory array and the memory array writes or retrieves data contained therein based upon the command. The memory controller can monitor multiple banks and manage bank activations. Accordingly, memory access overhead can be reduced and memory devices can be…
COLLIMATED BEAM CHANNEL WITH FOUR LENS OPTICAL SURFACES
Granted: April 10, 2014
Application Number:
20140099125
An optical system and method disclosed include a first lens component and a second lens component within the receive path or the transmit path. The first lens component includes at least two aspheric surfaces that oppose one another and generate a collimated beam channel. The second lens component generates a converging beam and magnifies the converging beam with a magnification factor that is different from a magnification factor in the other path, either the receive path or the…
HIGH-DENSITY FIBER COUPLING AND EMISSION/DETECTION SYSTEM
Granted: April 10, 2014
Application Number:
20140099124
An optical system including an array of photonic devices that convert light signals to electrical signals or electrical signals to light signals are coupled together and optically coupled to an array of optic fibers of an information channel. A lens couples optical beams generated to at least one array of photonic devices and the array of optic fibers for an optical communication there-between. The array of photonic devices and the array of optic fibers are respectively arranged in a…
MANAGING BANKS IN A MEMORY SYSTEM
Granted: April 10, 2014
Application Number:
20140101381
Systems and methods are provided that facilitate memory storage in a multi-bank memory device. The system contains a memory controller and a memory array communicatively coupled to the memory controller. The memory controller sends commands to the memory array and the memory array updates or retrieves data contained therein based upon the command. If the memory controller detects a pattern of memory requests, the memory controller can issue a preemptive activation request to the memory…
IMAGING SYSTEM FOR PASSIVE ALIGNMENT OF ENGINES
Granted: April 3, 2014
Application Number:
20140093250
Methods and systems for facilitating alignment of optical systems and optoelectronic systems are disclosed here. The methods and systems include passively detecting images, determining relative positions of components and aligning components. An imaging component can detect images and determine relative positions and repositioning instructions.
METHOD FOR PASSIVE ALIGNMENT OF OPTICAL COMPONENTS TO A SUBSTRATE
Granted: March 27, 2014
Application Number:
20140082935
A method for placing components on a substrate, the method comprising determining a reference point of a mechanical holding jig based upon a plurality of mechanical features of the mechanical holding jig and placing the substrate into the jig such that mechanical features on the substrate align with the mechanical features on the mechanical holding jig. A location of the substrate is determined with the reference point of the mechanical holding jig. The method continues by installing a…
SYSTEM AND METHOD FOR PROCESS, VOLTAGE, TEMPERATURE (PVT) STABLE DIFFERENTIAL AMPLIFIER TRANSFER FUNCTION
Granted: January 9, 2014
Application Number:
20140010333
A method is provided for process, voltage, temperature (PVT) stable transfer function calibration in a differential amplifier. The gain resistors of a differential amplifier are initially selected to achieve a flat amplitude transfer function in the first frequency band. After calibration, the degeneration capacitor is connected and tuned until a peaked amplitude transfer function is measured, which is resistant to variations in PVT. As an alternative, the degeneration capacitor is not…
DETECTION AND ESTIMATION OF NARROWBAND INTERFERENCE BY MATRIX MULTIPLICATION
Granted: August 22, 2013
Application Number:
20130215949
One or more processing units are programmed to select from among M tones in a frequency domain representation of a signal, a set of tones including at least a strongest tone (relative to background noise) and a tone adjacent thereto. From among M complex numbers in the frequency domain representation of the signal, a set of complex numbers are identified and denoted as a vector Z, corresponding to the selected set of tones. Vector Z is then multiplied with each of M columns of a matrix G…
Confirmation of Presence of Narrowband Interference By Harmonic Analysis
Granted: May 24, 2012
Application Number:
20120128049
One or more processing units confirm existence of narrow band interference in a signal by using an estimate f of the frequency, to check for one or more harmonics. In illustrative embodiments, the estimate f is automatically identified as a second harmonic if a predetermined criterion is satisfied by the signal (in the frequency domain) at either of two frequencies namely (A) frequency f/2 and (B) frequency (M?f)/2 and whichever of these two frequencies is stronger is identified as the…
Detection and Estimation of Narrowband Interference By Matrix Multiplication
Granted: May 24, 2012
Application Number:
20120128048
One or more processing units are programmed to select from among M tones in a frequency domain representation of a signal, a set of tones including at least a strongest tone (relative to background noise) and a tone adjacent thereto. From among M complex numbers in the frequency domain representation of the signal, a set of complex numbers are identified and denoted as a vector Z, corresponding to the selected set of tones. Vector Z is then multiplied with each of M columns of a matrix G…
Stabilized Digital Quadrature Oscillator
Granted: May 24, 2012
Application Number:
20120126903
A stabilized quadrature oscillator providing consistently high signal quality is disclosed. The stabilized quadrature oscillator includes an iterative quadrature oscillator and a quadrature signal stabilizer. The iterative quadrature oscillator generates an iterative cosine signal and an iterative sine signal using a stabilized cosine signal and a stabilized sine signal from the quadrature signal stabilizer. The quadrature signal stabilizer generates the stabilized cosine signal and the…
Adaptive Spectral Enhancement and Harmonic Separation
Granted: January 19, 2012
Application Number:
20120013398
A circuit and method perform adaptive spectral enhancement at a frequency ?1 (also called “fundamental” frequency) on an input signal y which includes electromagnetic interference (EMI) at an unknown frequency, to generate a fundamental-enhanced signal ?1 (or its complement). The fundamental-enhanced signal ?1 (or complement) is thereafter used in a notching circuit (also called “fundamental notching” circuit) to generate a fundamental-notched signal y??1. The fundamental-notched…
Narrowband Interference Cancellation Method and Circuit
Granted: January 19, 2012
Application Number:
20120014416
A narrowband interference (NBI) canceller is coupled to an A/D converter to receive an input signal and supply an NBI-canceled signal to an error correcting decoder. In the NBI canceller, a first arithmetic unit receives the input signal and a predicted-interference signal, and supplies a difference thereof as the interference-canceled signal. A slicer receives the interference-canceled signal and supplies a decision signal. A second arithmetic unit subtracts the decision signal from the…
Adaptive Narrowband Interference Prediction Circuit and Method
Granted: January 19, 2012
Application Number:
20120014487
An input signal that includes narrowband interference is spectrally enhanced by an adaptive circuit that supplies as output signal(s), portion(s) of NBI at one or more frequencies that change adaptively. The output signal(s) are used in one or more tone predictor(s) to generate, based on prior values of the NBI portion, one or more predicted tone signals that are subtracted from a received signal containing the NBI, and the result is used in the normal manner, e.g. decoded. The adaptive…
Source Power Limiting Charging System
Granted: September 30, 2010
Application Number:
20100244785
Methods and systems for charging energy storage devices are disclosed. Often the charging circuit may have different levels of power available to charge the energy storage device depending on the state of other subsystems of the electronic system. The present invention provides a source power limiting charging system. Often the losses of the charging system and losses due to the power requirements of support systems are not well known and/or are variable. Controlling source power to the…
Method of Accelerating the Shortest Path Problem
Granted: April 22, 2010
Application Number:
20100100569
The solution to the shortest path between a source node and multiple destination nodes is accelerated using a grouping of nodes, where the nodes are grouped based on distance from the source node, and a corresponding set of memory locations that indicate when a group includes one or more nodes. The memory locations can be quickly searched to determine the group that represents the shortest distance from the source node and that includes one or more nodes. Nodes may be grouped into…
10 GBE LAN SIGNAL MAPPING TO OTU2 SIGNAL
Granted: June 11, 2009
Application Number:
20090148161
A high-capacity digital communications system and method of transporting 10 GbE LAN packets between user devices over an OTN network that allows the packets to be transported in a manner that is transparent to the destination device(s) on the network. The digital communications system includes an OTN network, and at least one source device and at least one destination device connected to the network via respective 10Gbase-R interfaces. The system transports 10 GbE LAN data packets over…
Cache mechanism for managing transient data
Granted: February 5, 2009
Application Number:
20090037661
A system and method are provided for managing transient data in cache memory. The method accepts a segment of data and stores the segment in a cache line. In response to accepting a read-invalidate command for the cache line, the segment is both read from the cache line and the cache line made invalid. If, prior to accepting the read-invalidate command, the segment in the cache line is modified, the modified segment is not stored in a backup storage memory as a result of subsequently…
Time-based cache control
Granted: February 5, 2009
Application Number:
20090037660
A time-based system and method are provided for controlling the management of cache memory. The method accepts a segment of data, and assigns a cache lock-time with a time duration to the segment. If a cache line is available, the segment is stored (in cache). The method protects the segment stored in the cache line from replacement until the expiration of the lock-time. Upon the expiration of the lock-time, the cache line is automatically made available for replacement. An available…
