Freescale Semiconductor,inc.

Equal1.labs Inc.

David Redmond

Dirk Robert Walter Leipold

Patrick Joseph Pratt

Conor O'Keeffe

Norman Beamish

Imran Bashir

Robert Bogdan Staszewski

Daniel B Schwartz

Jacques Trichet

Aidan Murphy

Wayne Edwards

Keith A Tilley

Hugh O Brien

A novel and useful system and method of quantum stochastic rounding using silicon based quantum dot arrays. Unitary noise is derived from a probability of detecting a particle within a quantum dot comprising position based charge qubits with two time independent basis states |0> and |1>. A two level electron tunneling device generates quantum noise and includes a reservoir of particles, a quantum dot, and a barrier used to control tunneling between the reservoir and the quantum dot. A detector outputs a digital stream corresponding to the probability of a particle being detected. Controlling the bias applied to the barrier controls the probability of detection. The probability density function (PDF) of the output unitary noise is controlled to correspond to a desired probability. Unitary noise is used to perform stochastic rounding by controlling the bias applied to the barrier according to a remainder of numbers to be rounded.

System and method of quantum stochastic rounding using silicon based quantum dot arrays

A novel and useful system and method of generating quantum unitary noise using silicon based quantum dot arrays. Unitary noise is derived from a probability of detecting a particle within a quantum dot array structure comprising position based charge qubits with two time independent basis states |0&#x3e; and |1&#x3e;. A two level electron tunneling device such as an interface device, qubit or other quantum structure is used to generate quantum noise. The electron tunneling device includes a reservoir of particles, a quantum dot, and a barrier that is used to control tunneling between the reservoir and the quantum dot. A detector circuit connected to the device outputs a digital stream corresponding to the probability of a particle of being detected. Controlling the bias applied to the barrier controls the probability of detection. Thus, the probability density function (PDF) of the output unitary noise can be controlled to correspond to a desired probability. The unitary noise can be used in stochastic rounding by controlling the bias applied to the barrier in accordance with a remainder of numbers to be rounded.

System and method of generating quantum unitary noise using silicon based quantum dot arrays

A wireless communication unit comprises a transmitter having a power amplifier and a feedback path operably coupled to the power amplifier. The feedback path comprises a coupler for feeding back a portion of a signal to be transmitted and a detector for detecting a power level of the fed back signal. A controller provides a ramp signal to the power amplifier that controls an amplitude characteristic of the signal to be transmitted. Averaging logic is operably coupled to the detector and arranged to average the detected power level over a first period. Comparison logic is operably coupled to the averaging logic and arranged to compare the average detected power level with a reference value. The controller is operably coupled to the comparison logic and arranged to scale a ramp signal applied to the power amplifier in response to the comparison.

Wireless communication unit, integrated circuit and method of power control therein

A method of processing location information on a mobile device which includes a primary receiver for receiving a primary signal; a diversity receiver for receiving a diversity signal or location information; a diversity combiner which can combine primary and diversity signals to form a combined signal; and a first processing unit for processing the combined signal; the method comprising the steps of: identifying whether the device is in a location mode or a diversity mode; if the device is in location mode, disabling the diversity combiner; passing the output from the primary receiver directly to the first processing unit; and passing location information from the diversity receiver to a location processing unit.

Method and apparatus to receive location information in a diversity enabled receiver

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Cork, Ireland

David Redmond