Synaptics Corporation

Ppc Broadband, Inc.

Atmel Corporation

Murat Ozbas

Imre Knausz

Noah Parnall Montena

Petr Shepelev

Kirk Hargreaves

Jeffrey Alan Small

Eric Scott Bohannon

Christopher A Ludden

Thomas A Mackin

Tracy Scott Dattalo

Michael Lawrence

Marshall J Bell, Jr

Jeffrey S Lillie

Kevin Fronczak

Farzaneh Shahrokhi

Yonggang Chen

Mark Pude

Christopher Ludden

An apparatus, system, and method are disclosed for compensating input offset of an amplifier having first and second amplifier output nodes. The method comprises generating a proportional-to-absolute temperature (PTAT) current, generating a complementary-to-absolute temperature (CTAT) current, and selecting, based on the input offset, one of the first and second amplifier output nodes into which a compensation current is to be coupled. The compensation current is based on a selected one of the PTAT current and CTAT current.

Temperature compensated offset cancellation for high-speed amplifiers

A voltage level shifter including a voltage converting unit to convert an input voltage into a current; a voltage level shifting unit to drive a driving voltage based on the current and shift a voltage level of the driving voltage when a modulation voltage is applied at a first voltage level to a floating ground; a circuit driving voltage supply unit to supply a circuit driving voltage and further to generate a shifted voltage level of the circuit driving voltage when the modulation voltage is applied at the first voltage level; and an output unit to supply an output voltage based on the circuit driving voltage and the driving voltage, and further supply the output voltage at a second voltage level based on the shifted voltage level of the driving voltage and the circuit driving voltage when the modulation voltage is applied at the first voltage level is disclosed.

Voltage level shifter

The embodiments herein are generally directed to using a current-mode CBC circuit to maintain a voltage bias setting at a receiver when performing capacitive sensing. To do so, the CBC circuit may compensate for the change in voltage at a receiver by providing a current at the input of the receiver. Instead of using a passive CBC capacitor for each receiver, the input device may use a single CBC capacitor and a plurality of current mirrors to source and sink the current required to correct the input voltage at a plurality of receivers. As a result, the current-mode CBC circuit includes only one passive capacitor (or bank of capacitors) and a plurality of current mirrors which may provide space and cost benefits relative to a CBC circuit that uses a passive capacitor (or bank of capacitors) for each receiver channel.

Current-mode coarse-baseline-correction

A method for detecting interference in an input device, the method involving: driving a transmitter signal onto a transmitter sensor electrode of the input device; receiving a resulting signal from a receiver sensor electrode of the input device; sampling a first value associated with the resulting signal during a first half of a sensing cycle; sampling a second value associated with the resulting signal during a second half of the sensing cycle; generating an interference value based on the first value and the second value; determining, based on the first value and the second value, an input in a sensing region of the input device; and comparing the interference value to a noise threshold.

Detecting interference in an input device having electrodes

Embodiments described herein synchronize a switching frequency of switched power supplies with timing events associated with updating a display screen or performing touch sensing. For example, a touch event may be the time needed for a touch controller to scan a plurality of sensing electrodes. Because noise is introduced each time switched power supplies switch between different stages, the touch controller may instruct a power management controller to switch between the stages (i.e., adjust the switching frequency) at the same time during each touch event. Even though the switched power supplies are permitted to introduce noise into the touch system, the noise happens at the same time during each touch event. Accordingly, the effect of the noise is the same for each touch event and is cancelled out. A similar process may be used for synchronizing the switching frequency to display events.

Synchronizing a switched power supply

Embodiments of the invention generally provide an input device that simultaneously transmits a multiplexed signal across two or more transmitter electrodes used in touch detection. The multiplexed includes two or more component signals that are transmitted on respective electrodes (or channels). The component signals are then decoded and correlated to indicate a positional location of an input object. Various multiplexing schemas&#x2014;e.g., code division multiplexing, frequency division multiplexing, orthogonal frequency division multiplexing, and the like&#x2014;may be used to generate the multiplex signal and then demultiplex the received results.

Flexible timing and multiplexing for a display device comprising an integrated capacitive sensing device

Disclosed herein is a coaxial cable connector that includes a backscattering arrangement configured to receive an RF signal in a coaxial transmission line and produce a modulated backscattered response. The modulated backscattered response corresponds to a sensed condition in the coaxial cable connector.

Coaxial cable connector, system and method of use thereof

A coaxial cable connector is provided, the connector includes: a connector body and a ground isolation circuit positioned within the connector body. The ground isolation circuit is configured to generate a voltage signal comprising a positive voltage and a negative voltage. The ground isolation circuit is electrically isolated from the connector body.

Growing community of inventors

Rochester, NY, United States of America

Murat Ozbas