Atmel Corporation

Neodron Limited

Einar Fredriksen

Trond Jarle Pedersen

Vemund Kval Bakken

Morten Werner Lund

An apparatus includes a display stack, a touch sensor, and a touch sensor controller. The display stack includes one or more layers. The touch sensor is disposed, at least in part, on a layer from among the one or more layers. The touch sensor controller has first and second portions. The first portion is coupled to a driver and is disposed, at least in part, on a layer from among the one or more layers. The second portion is coupled to a current sensor. The current sensor and the driver are coupled to a capacitor.

Touchscreen communication interface

In one embodiment, a method includes measuring two or more output signals, calculating a plurality of reconstructed values, and determining a position of an object relative to a touch sensor based at least on the plurality of reconstructed values. Each output signal is associated with one of two or more differential integrators. Each differential integrator includes first and second inputs connected to respective electrode tracks of the touch sensor and an output configured to generate the output signal proportional to a difference between signals received at the first and second inputs. The differential integrators are chained such that each electrode track is associated with a previous electrode track connected to the first input of the differential integrator whose second input is connected to the electrode track and a next electrode track connected to the second input of the differential integrator whose first input is electrically connected to the electrode track.

Chained differential sensing for touch sensors

A USB device can be configured for multi-packet data transfer to and from endpoints with minimal software intervention. Minimal software intervention allows a Central Processing Unit (CPU) of the USB device to handle other tasks, maximizing USB bus utilization.

Autonomous multi-packet transfer for universal serial bus

A converter includes an analog to digital converter having a bias current input, a control input, and an analog input to provide a digital output as a function of the analog input. A bias module is coupled to the bias current input to provide bias current to the analog to digital converter. A controller is coupled to the bias module and to the control input of the analog to digital converter. The controller controls the analog to digital converter to sample an analog input and controls the bias module to provide an operating bias current during sampling of the analog input and an idle bias current when not sampling the analog input.

Controlling bias current for an analog to digital converter

An analog to digital converter has an input for coupling to multiple channels having analog signals. The analog to digital converter converts the analog signals on such channels to provide a digital output. A memory device has an enable bit for each of the multiple channels and a current channel register. An interface coupled to the memory device and current channel register selects a next channel for converting by the analog to digital converter, skipping channels that are not enabled.

Growing community of inventors

Trondheim, Norway

Einar Fredriksen