Touch sensor having improved edge response
Granted: September 10, 2013
Patent Number:
8531418
A sensor is provided. The sensor includes a planar sensing area including a sensor layout. The sensor layout includes an interior portion, an edge portion, and edges. The sensor layout also includes interior sensing elements, the interior sensing elements being located in the interior portion, and edge sensing elements, the edge sensing elements being located in the edge portion. The interior sensing elements are arranged in the sensor layout such that the interior sensing elements…
Method and apparatus for an equalized on-die termination (ODT) circuit
Granted: August 27, 2013
Patent Number:
8521119
A method and apparatus for an equalized On-Die Termination (ODT) circuit uses timed switching to reduce receiver power consumption.
Third overtone crystal-based oscillators having tunable all-pass RC filters therein
Granted: August 27, 2013
Patent Number:
8519800
Integrated circuit oscillators include a cascaded arrangement of first and second all-pass networks containing a resonator therein, such as a crystal-based resonator. The second all-pass network is configured to provide negative feedback to the first all-pass network at DC (i.e., very low frequencies) and is further configured to provide positive feedback with 90 degrees of phase to the first all-pass network at the resonant frequency of the resonator, which may be the third overtone…
Hardware-based concurrent direct memory access (DMA) engines on serial rapid input/output SRIO interface
Granted: August 20, 2013
Patent Number:
8516163
A serial buffer includes queues configured to store data packets received from a host. A direct memory access (DMA) engine receives data packets from the highest priority queue having a water level that reaches a corresponding watermark. The DMA engine is configured in response to a DMA register set, which is selected from a plurality of DMA register sets. The DMA register set used to configure the DMA engine can be selected in response to information in the header of the read data…
Method and apparatus for implementation of PLL minimum frequency via voltage comparison
Granted: August 20, 2013
Patent Number:
8513992
A method and apparatus for implementation of PLL minimum frequency via voltage comparison have been described.
Combinations of current feedback for frequency compensation, overload detection, and super overload detection in switching power converters
Granted: August 20, 2013
Patent Number:
8513935
A single replica current is proportional to current through a main switch of a switching power converter. This replica current may be used for current compensation, detection and response to an overload, detection and response to a super-overload, and combinations thereof. An input voltage is switchably coupled to an output signal generating a load current responsive to a switch control. A replica switch generates a replica current proportional to the load current. A ramp modulation…
System and method for communication handshaking between a master processors and a slave processor
Granted: August 13, 2013
Patent Number:
8510492
System and method for handshaking between first and second processors via a single wire connecting a first pin of the first processor and a second pin of the second processor are described. In one embodiment, the method comprises the first processor disabling an interrupt function on the first pin; and, subsequent to the disabling, interrupting the second processor by driving the first pin to a first logic level and then releasing the first pin to a second logic level.
Multi-band clock generator with adaptive frequency calibration and enhanced frequency locking
Granted: August 13, 2013
Patent Number:
8509372
A multi-band clock generator includes a phase-locked loop (PLL) integrated circuit responding to first and second clock signals, and includes a multi-band voltage controlled oscillator (VCO) responding to a multi-bit control word that sets a frequency characteristic curve of the VCO. The multi-band clock generator also includes an adaptive frequency calibration (AFC) circuit responding to the first and second clock signals, and the AFC circuit is configured to look-up a first multi-bit…
High speed switch with data converter physical ports
Granted: August 6, 2013
Patent Number:
8503514
A high-speed switch that includes a switch fabric, and both high-speed serial ports and data converter physical ports. A first set of data converter physical ports may perform analog-to-digital conversions, such that an external analog signal may be converted to a digital input signal on the switch. The converted digital input signal may then be routed through the switch fabric in accordance with a serial data protocol. A second set of data converter physical ports may perform…
High speed switch with data converter physical ports and processing unit
Granted: August 6, 2013
Patent Number:
8503515
An integrated circuit chip implements a high-speed switch that includes: a switch fabric; control logic that controls the transmission of digital signals through the switch fabric; a transceiver block comprising one or more transceivers, each transmitting digital signals between the control logic and a corresponding external device; a data converter physical interface comprising one or more data converters, each performing a conversion between analog and digital signals, wherein digital…
Methods of forming micro-electromechanical resonators using passive compensation techniques
Granted: August 6, 2013
Patent Number:
8501515
Methods of forming electro-micromechanical resonators provide passive temperature compensation of semiconductor device layers used therein. A first substrate is provided that includes a first electrically insulating temperature compensation layer on a first semiconductor device layer. A step is performed to bond the first electrically insulating temperature compensation layer to a second substrate containing the second electrically insulating temperature compensation layer therein, to…
Slew rate-variation based driver equalization for far-end crosstalk cancellation
Granted: July 23, 2013
Patent Number:
8493833
A communication system is disclosed. The communication system comprises a printed circuit board. The printed circuit board includes a plurality of channels; The communication system includes a plurality of receivers coupled to outputs of the plurality of channels; and a plurality of drivers coupled to inputs of the plurality of channels, wherein a slew rate for each of the plurality drivers is dependent on the transitions of its neighboring drivers. The communication system further…
Mechanical means for providing haptic feedback in connection with capacitive sensing mechanisms
Granted: July 23, 2013
Patent Number:
8493357
Method and apparatus for providing haptic feedback in connection with a capacitive sensing mechanism are described. In one embodiment, the apparatus comprises a convex, non-metallic structure arranged so as to maintain physical separation between an activator and the capacitive sensing mechanism until sufficient force is applied by the activator. The structure does not form a part of an electrical circuit comprising the capacitive sensing mechanism.
Method of gain calibration of an ADC stage and an ADC stage
Granted: July 16, 2013
Patent Number:
8487792
A method of gain calibration of an ADC stage is provided. The method includes steps of receiving an input analog signal, converting the input analog signal into an m-bit digital signal by means of an analog to digital converter, generating a calibration signal by means of a random number generator, adding the calibration signal to the m-bit digital signal to produce an adjusted m-bit digital signal, converting the adjusted m-bit digital signal into an adjusted partial analog signal by…
Method of improving over protocol-required scheduling tables while maintaining same
Granted: June 11, 2013
Patent Number:
8462628
Public scheduling tables of PCI-Express network devices are remapped into private scheduling tables having different data structures. The private scheduling tables enable the construction of parallel-processing selection engines (ones with look-ahead selection capabilities) that are more compact in size than would have been possible with use of the data structures of the public scheduling tables. In one embodiment, residual weight values are re-shuffled so as to move each winner of an…
Low noise variable gain amplifier utilizing variable feedback techniques with constant input/output impedance
Granted: June 4, 2013
Patent Number:
8456237
Variable feedback architecture and control techniques for variable gain amplifiers (VGAs) concurrently maintain, across a wide range of VGA gain settings, minimal input and output impedance variations, a low noise figure, low rates of change in noise figure, high signal-to-noise ratio (SNR), high quality of service (QoS), low distortion, high and relatively constant output third order intercept point (i.e., IP3 or TOI). Variable feedback counteracts impedance variations caused by gain…
Switched-capacitor pipeline stage
Granted: May 28, 2013
Patent Number:
8451161
A circuit for an N-bit stage (110i) of a pipeline ADC having L=2N levels, the circuit comprising: an operational amplifier (420); a first feedback capacitor (Cf1) having a first plate connected to an input of the operational amplifier and a second plate switchably connected on a first clock signal (?1) to a first input voltage (±Vm) and on a second clock signal (?2) to an output of the operational amplifier; a second feedback capacitor (Cf2) having a first plate connected to the input…
Pipelined ADC calibration
Granted: May 28, 2013
Patent Number:
8451154
A method of calibrating a pipelined analog to digital converter having a plurality of DAC elements and an additional calibration DAC element is provided. In the method as provided herein, a combination of positive, negative and zero reference voltages are applied to the element under calibration and positive and negative reference voltages are applied to the additional calibration DAC element to obtain four calibration states. An error of the DAC element under calibration is extracted by…
Method and apparatus for predictive switching
Granted: May 21, 2013
Patent Number:
8447902
A method and apparatus for predictive switching an output have been disclosed.
Packets transfer device that intelligently accounts for variable egress channel widths when scheduling use of dispatch bus by egressing packet streams
Granted: May 7, 2013
Patent Number:
8437369
In PCI-Express and alike communications systems, data bandwidth per channel can vary as a result of negotiated port aggregation and/or bifurcation during network bring-up. Disclosed are systems and methods for opportunistically interleaving dispatches of packet data for secondary egress channels when the data bandwidth of a primary egress channel is relatively small and thus creates slack on a dispatch bus between dispatches of primary data blocks.
