Nokia Mobile Phones Limited

Neonode Inc.

Texas Instruments Corporation

Nokia Corporation

Saska J Lindfors

Kari Halonen

Thomas Eriksson

Lars Bertil Sparf

John Karlsson

Robert Pettersson

Alexander Jubner

Aarno Tapio Pärssinen

Liangge Xu

Kari Stadius

Jussi Ryynanen

Tapio Ilmari Rapinoja

Risto H S Kaunisto

Asko Kananen

Aarno P&auml;rssinen

Matti Aaltonen

Jonne J Lindeberg

Ari Paasio

An apparatus is provided. There is an input terminal that is configured to receive an input signal from a optical receiver and an output terminal. First and second integrators are coupled between the input and output terminals. In the second integrator, there is a current source that is coupled to the input terminal, a first resistor that is coupled to the output terminal, and a second resistor. Also, there is an amplifier having a first input, a second input, and an output, where the first resistor is coupled to the first input of the amplifier and where the second input of the amplifier is configured to receive a reference voltage. A transistor is coupled between the current source the second resistor and is coupled to the output of the amplifier at its gate. A capacitor is also coupled between the first input of the amplifier and the second resistor.

Feedback integrator current source, transistor, and resistor coupled to input

A touch screen assembly including a display, infra-red light emitters, photo diodes, a transparent frame including an exposed upper edge along its perimeter, and internally reflective facets for directing light emitted by the emitters along light paths that travel upward through one side of the frame, over the display screen, downward through the opposite side of the frame, and onto the photo diodes, and a processor operative to identify a location of an object touching the display, based on amounts of light detected by photo diodes when light emitted by light emitters is blocked along its light path by the object, and to recognize the object touching an outer wall of the frame, based on amounts of light detected by activated photo diodes when light emitted by activated emitters is absorbed along its light path by the object at the outer wall, thereby providing touch sensitivity to the frame itself.

Integrated light guide and touch screen frame

A touch screen assembly including a glass screen, LEDs, photo diodes, a transparent plastic frame surrounding the screen, and a light guide that guides light emitted by the LEDs to the photo diodes along light paths that go under the frame on one side, over the screen, and under the frame on the opposite side, and a processor operative to selectively activate LEDs and photo diodes, to identify location of an object touching the screen, based on amounts of light detected by activated photo diodes when light emitted by activated LEDs is blocked along its light path by the object, and to recognize the object touching the frame, based on amounts of light detected by activated photo diodes when light emitted by activated LEDs is absorbed along its light path by the object, thereby providing light-based touch sensitivity to the screen and to the frame.

Integrated light guide and touch screen frame and multi-touch determination method

Described is an apparatus that includes a frequency source and a plurality of time domain direct digital synthesizers each having an input connected to an output of the frequency source and an output providing an output frequency signal. A particular time domain direct digital synthesizer includes a sigma-delta modulator that functions as a second order multi-stage noise shaping sigma-delta modulator. In one exemplary embodiment sigma-delta modulator outputs provide a unitary-weighted word used to switch certain unit capacitors that comprise part of a delay modulator to produce a time-varying delay having a time-averaged value that directly corresponds to a binary value appearing on a plurality of phase accumulator outputs.

Frequency synthesizer having a plurality of independent output tones

The invention pertains to a method and corrector (IC ) for correcting an error in a parallel analog-to-digital conversion. Such a correctable error is caused by uncertainties in the reading of the states of parallel comparing elements (IC IC IC IC ) in the converter, said uncertainties being brought about by nonideality, such as non-simultaneous state latching. This error is corrected using a nonlinear cellular neural network preferably such that the real level of the phenomenon compared by means of comparing elements (IC IC IC IC ) is estimated by estimating the states corresponding to correct reading of the comparing elements (IC IC IC IC ) read temporally or otherwise erroneously.

Method for correcting errors in parallel A/D conversion, corrector and parallel A/D converter

Method and circuit for sampling a signal at high sampling frequency

A delta-sigma modulator for converting an analog input signal into a digital output signal comprises a modulator input (,) and a first analog to digital converter (,) coupled to the modulator input (,). The first analog to digital converter has a first analog input and a first digital output. The delta-sigma modulator further comprises an error quantization unit (,) coupled to the first digital output for determining the quantization error caused by the first analog to digital converter (,). Additionally it comprises first signal combining means (,) for combining the outputs of the first analog to digital converter and said error quantization unit to form the digital output signal.

Delta-sigma modulator with two-step quantization, and method for using two-step quantization in delta-sigma modulation

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Espoo, Finland

Saska J Lindfors