Motorola Corporation

Freescale Semiconductor,inc.

Nxp Usa, Inc.

Recon/optical, Inc.

David A Hayner

Shay-Ping T Wang

Dan Teng

Bruce Edward Stuckman

Dejan Mijuskovic

Honglin Sun

John Phillip Hansen

Shao Wei Pan

Nicholas M Labun

Donald L Tietjen

Todd Frederick Miller

Keith L Kraver

Scott Edward Lloyd

Ronald W Stence

Michael Deur

Michael E Mitchell

Maureen A Stengler

A microcontroller-based method and apparatus are described for measuring motions signals () with a plurality of inertial sensors (-) contained within a device package housing and validating () a first measured motion signal (e.g., &#x3a9;) by generating at least a first estimated value &#x3a9;for the first motion signal (e.g.,) based on at least a second measured motion signal (e.g., A) and for comparing the first estimated value for the first motion signal () to the first measured motion signal &#x3a9;in order to validate the first measured motion signal &#x3a9;.

Use of multiple internal sensors for measurements validation

A microcontroller-based method and apparatus are described for generating one or more amplitude and frequency selectable low frequency pilot tone signals (PT) that are injected into an embedded MEMS sensor () and mixed signal ASIC () and then recovered at the microcontroller () to compute or measure various gyro parameters during operational use of the device with no down time or interference with normal operations.

Generation, injection and use of pilot tones for gyro system characterization

A low-cost technique to improve the performance of optical disk drives is presented. An algorithm is used to decouple electro-mechanical actuators thus compensating for inaccuracies in the control of the actuators. A similar method can be used to decouple the position sensors. Prior art methods treated cross-coupling between focus, tracking and sled control loops as noise and therefore increased the bandwidth of the system, also increasing the cost of the optical disk drive. The present disclosure actively decouples the control loops using a software algorithm to provide better performing optical disk drives. The cross-coupling effects are measured, a decoupling matrix is determined, and the output of the control laws is modified so as to decouple the actuators.

Decoupling technique for optical disk drive optical pickup units

Apparatus and methods for applying stress-induced offset compensation and/or scale factor correction in sensor devices are provided. One sensor device () includes an integrated circuit device (), a transducer () coupled to the ASIC device, and a stress sensor () coupled to the transducer or the integrated circuit device and configured to measure stress on the sensor device independent of the transducer. Another sensor device () includes a transducer, a sensor package () enclosing the transducer, and a stress sensor () coupled to the sensor device package and configured to measure stress on the sensor device independent of the transducer. A method includes detecting, via a stress sensor, an amount of stress being applied to the sensor device and adjusting, via the stress sensor and independent of the transducer, an output of the sensor device by the detected amount of stress.

Apparatus and methods for applying stress-induced offset compensation in sensor devices

An inertial sensor has a transducer with a sense resonator. The sense resonator is oscillated. A signal responsive to the oscillation is provided. A first baseband signal and a second baseband signal are provided responsive to the signal responsive to the oscillation of the sense resonator. A signal for controlling a resonance frequency of the sense resonator is provided responsive to performing a Goertzel algorithm on the first baseband signal and the second baseband signal. One use of controlling the resonance frequency is to control an offset between the resonance frequency of the sense resonator and the frequency of the oscillation of drive masses in the sense resonator. Using the Goertzel algorithm is particularly efficient in controlling the resonance frequency.

MEMS inertial sensor with frequency control and method

A method of de-interlacing interlaced video information including determining functional equations which estimate trajectories of corresponding pixel locations based on statistical information, updating each functional equation with sampled pixel values from the interlaced video information of corresponding pixel locations, and evaluating the functional equations at a time point of a progressive frame and providing corresponding progressive pixel values. A video de-interlace system including a trajectory estimator and a component estimator. The trajectory estimator provides functional equations estimating trajectories of tracked pixel locations based on statistical information. The component estimator receives the functional equations and the interlaced video information and provides progressive pixel values. The component estimator updates each functional equation with sampled pixel values from the interlaced video information, and evaluates the updated functional equations at selected time points to provide progressive frames.

Video de-interlacer using pixel trajectory

A method of de-interlacing input video information including averaging odd lines and averaging even lines of the input video information to determine first and second in-field information, determining differences between even and odd lines of the input video information to provide residue information, measuring a motion metric of the residue information, filtering the residue information based on the motion metric to provide filtered residue information, and combining the first and second in-field information with the filtered residue information to provide progressive information. The combining may be an average of the in-field information added to a weighted portion of the filtered residue information as determined by the motion metric. The motion metric may be determined by an infinite impulse response filter. Finite impulse response filters may be used to filter the residue information.

Video de-interlacer using motion residue compensation

A data storage system having a non IC based memory and an IC based non-volatile memory for storing user data. In one example, the IC based non-volatile memory is implemented with MRAM. Examples of non IC based memory include e.g. hard disks, tape, and compact disks. In some examples, the IC based memory is utilized to store user data from an information device in order to increase the speed and/or the effective storage capacity of the data storage system. In some examples, a portion of a standard size block of user data can be stored on spaces of the non IC based memory that are deficient for storing a standard size block with the remaining portion being stored in IC based memory. Portions of a file of user data may be non-volatilely stored in the IC based memory in order to more quickly provide the file to an information device. For example, data of a file, that if stored in a location on the non IC based media would significantly increase the retrieval time of the file, can be stored in the IC based media.

Data storage system having a non-volatile IC based memory for storing user data

A method and apparatus for interconnecting circuit portions () within a data processing system () using a master/slave interfaces () which may be configured by way of configuration registers (). External address generation circuitry () and internal address generation circuitry () may be used to generate externally used addresses and internally used addresses, respectively. A circuit portion (e.g.) may have a plurality of interfaces () which may operate as a slave interface (e.g.) or as a master interface (e.g.). A same master/slave interface structure and protocol (e.g.) may be duplicated and individually configured to be used to communicate among all of the circuit portions () within a data processing system ().

Method and apparatus for interconnecting portions of circuitry within a data processing system

A data storage apparatus includes a servo controller (,) coupled to an actuator (,). The servo controller (,) provides control command signals to the actuator (,) to move a head from an initial position to a final position at a discrete time interval. A method of moving at least one head of a disk drive is also provided. The method includes the step of moving the head from an initial track to a final track without utilizing a separate track acquisition operation to position the head over the final track.

Methods and devices for controlling a head position actuator of a disk drive

A device in accordance with the present invention includes drive circuitry (110) coupled to a plant (120). The drive circuitry (110) generates a first set of command signals to transition the state of the plant (120) from an initial state to an intermediate state at a first discrete time. The drive circuitry (110) generates a second set of command signals to transition the state of the plant (120) from the intermediate state to the final state at a second discrete time. A state estimator (130) is coupled to the plant to detect the state of the plant (120). A method for changing the state of a plant (120) is also provided. The method includes the steps of transitioning the plant (120) from a first state to a selected state at one of a plurality of discrete times, each of the discrete times being separated by at least one discrete time interval, and transitioning the plant (120) from the selected state to a final state at another of the plurality of discrete times.

Method and control system for changing the state of a plant

The present invention provides a control system (200) having a digital controller (212) producing output signals at a plurality of update times. Control circuitry is responsive to the controller (212) and outputs at least one command signal to the plant (210) at a different time than the update times. A method of controlling a plant (210) is also provided. The method includes the steps of providing a digital controller (212) to determine a plurality of switching times and to produce output signals at a plurality of update times, and providing at least one command signal to the plant (210) at a different time than the update times.

Methods and devices for controlling a disk drive

A motor controller includes an input terminal (22), a frequency selective network, a first controller, and a second controller. The input terminal is adapted to be coupled to a drive phase of a motor (16) for receiving a signal (24). The frequency selective network (18) has an input coupled to the input terminal (22) and an output for providing a first signal representative of the back EMF signal within a frequency range corresponding to a predetermined harmonic frequency above a primary frequency thereof. The first controller (20) has an input coupled to the output of the frequency selective network (18) and an output for providing a second signal representative of a position or a velocity of a rotor of the motor (16). The second controller (10) has an input coupled to the output of the first controller (20) and an output for providing a third signal. The third signal indicates how the motor (16) is to be driven.

Motor controller, integrated circuit, and method of controlling a motor

A voltage generation circuit (60, 62) is adapted to sense voltages on multiple windings (82, 84, 86) of a multi-phase brushless DC motor (22) during successive intervals of a rotation of the motor (22) in which the respective windings (82, 84, 86) are not being driven. The voltage generation circuit (60, 62) provides a different output voltage from the voltage used to drive the motor (22). In one embodiment, the voltage generation circuit (60, 62) includes a voltage boosting circuit (62) to increase the output voltage above the drive voltage. This voltage generation circuit (60, 62) may be advantageously combined with an electrically programmable read only memory (EPROM) (56) on a single integrated circuit chip. The voltage generation circuit (60, 62) generates the EPROM programming voltage without the need for a costly on-chip charge pump or off-chip DC-DC converter.

Method and apparatus for high voltage generation

In a polynomial processor a plurality of training data are received which express the desired relationship between the processor's output and input. The terms of a polynomial function are determined using a regression subsets method on the training data. The coefficient for each term is determined and the polynomial processor is programmed by loading the terms and coefficients into the processor.

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Austin, TX, United States of America

David A Hayner