Patents Assigned to Analog Devices, Inc.
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Publication number: 20130194118Abstract: A circuit system for performing correlated double sampling may include a signal sampling stage having an amplifier with a feedback capacitor and a pair of storage capacitors coupled to an output of the amplifier, and a differential analog to digital converter (ADC) having a pair of inputs coupled respectively to storage capacitors of the signal sampling stage. The signal sampling stage may receive reset and signal values from a sensor device and may store processed versions of those signals on respective storage capacitors. The differential ADC may generate a digital value representing a signal captured by the sensor device from a differential digitization operation performed on the processed versions of the reset and signal values. In this manner, the system may correct for any signal errors introduced by components of the sampling stage.Type: ApplicationFiled: August 2, 2012Publication date: August 1, 2013Applicant: ANALOG DEVICES, INC.Inventors: Michael COLN, Gary R. CARREAU, Yoshinori KUSUDA
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Patent number: 8497735Abstract: Variable attenuation systems having continuous input steering may be used to implement vector or quadrature modulators and vector multipliers. Discrete implementations of attenuators with continuous input steering may have two outputs which may be cross-connected to provide four-quadrant operation. A symmetrically driven center tap may provide improved zero-point accuracy.Type: GrantFiled: March 8, 2011Date of Patent: July 30, 2013Assignee: Analog Devices, Inc.Inventor: Barrie Gilbert
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Patent number: 8497697Abstract: Film frame assemblies and apparatus for testing and singulating integrated circuit packages, as well as associated methods for forming a film frame assembly, and testing and singulating integrated circuit packages are disclosed. A plurality of leads on a lead frame are cut to form singulated integrated circuit packages. Apparatus and methods are disclosed for mechanically aligning a set of electrical contacts attached to a contactor body with a plurality of leads on a singulated integrated circuit package.Type: GrantFiled: June 14, 2010Date of Patent: July 30, 2013Assignee: Analog Devices, Inc.Inventor: Gerard Blaney
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Patent number: 8498178Abstract: An array of acoustic transducing unit cells configured with an acoustic focus or a beam steering orientation. A variety of time delays between consecutively coupled acoustic transducing unit cells provides acoustic focus. In another configuration, a resistive signal path between adjacent acoustic transducing unit cells can be used to acoustically steer an acoustic beam in a direction non-normal to the top surface in which the array is disposed. In a further embodiment, a signal pad is made available at each end of the connections through an array of capacitive micromachined ultrasonic transducing unit cells.Type: GrantFiled: December 13, 2011Date of Patent: July 30, 2013Assignee: Analog Devices, Inc.Inventors: Christophe Antoine, Andrew W. Sparks
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Publication number: 20130187683Abstract: Apparatus and methods are disclosed related to using one or more field effect transistors as a resistor. One such apparatus can include a field effect transistor (FET), averaging resistors and a bidirectional current source. The averaging resistors can apply an average of a voltage at the source of the FET and a voltage at the drain of the FET to the gate of the field effect transistor. The bidirectional current source can turn the FET on and off. The FET can operate in the ohmic region when on. Such an apparatus can improve the linearity of the FET as a resistor, for example, at lower frequencies near or at direct current (DC). In some implementations, the apparatus can include one or more current sources to remove an offset introduced by the bidirectional current source at the source and/or the drain of the FET.Type: ApplicationFiled: January 25, 2012Publication date: July 25, 2013Applicant: Analog Devices, Inc.Inventor: Omid Foroudi
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Patent number: 8493148Abstract: Aspects of the present invention provide apparatuses and methods to provide significant gain enhancement for a cascode structure for a differential amplifier. The cascode structure of the differential amplifier can include first and second pairs of output transistors. The second pair of output transistors can be configured to approximately cancel modulation effects of the first pair of output transistors induced by changes in a differential output of differential amplifier, thereby resulting in conditions for providing enhanced gain.Type: GrantFiled: November 4, 2011Date of Patent: July 23, 2013Assignee: Analog Devices, Inc.Inventor: Franklin Murden
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Patent number: 8493102Abstract: Apparatus and methods provide a differential current buffer. The current buffer has cross-coupled feedback and offers relatively good common-mode rejection and a relatively low and linear input impedance, which can reduce intermodulation distortion. The current buffer can be used in, for example, an RF modulator, such as a quadrature modulator.Type: GrantFiled: October 12, 2011Date of Patent: July 23, 2013Assignee: Analog Devices, Inc.Inventor: Edmund Balboni
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Patent number: 8493139Abstract: An amplifier may include a low noise auto-zero circuit with auto-zero capacitors and switch-controlled auxiliary capacitors that function as switched-capacitor low-pass filters. In an acquisition phase of the auto-zero operation, the inputs of an amplifier may be shorted to a common voltage, and a representation of the offset voltage may be acquired by the auto-zero capacitors. In a hold phase of the auto-zero operation, the auto-zero capacitors may be connected to the auxiliary capacitors, and the resulting voltages may be applied to the circuit such that the original offset voltage is cancelled. Moreover, the switched-capacitor filters may reduce the effective sampling noise while maintaining high acquisition bandwidth.Type: GrantFiled: November 17, 2011Date of Patent: July 23, 2013Assignee: Analog Devices, Inc.Inventor: Mark Sayuk
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Publication number: 20130181760Abstract: A fully on-chip clock generator on an integrated circuit (“IC”) includes a frequency detector for receiving a reference current and providing a first voltage; an error integrator for receiving the first voltage from the frequency detector, comparing it with a reference voltage, and providing a control voltage; a voltage controlled oscillator (“VCO”) for receiving the control voltage from the error integrator, and providing an output clock; and a logic controller on the IC, coupled between the VCO and the frequency detector, and generating logic control signals for controlling the frequency detector. The fully on-chip clock generator requires no external crystal, but its power consumption is significantly lower than a relaxation oscillator that generates the same clock frequency.Type: ApplicationFiled: January 13, 2012Publication date: July 18, 2013Applicant: ANALOG DEVICES, INC.Inventor: Yijing LIN
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Patent number: 8487659Abstract: An adaptive delay device that provides a delay to a signal based on circuit conditions such as temperature, supply voltage values and/or fabrication processes. The adaptive delay device may respond to circuit conditions by charging a capacitive device to a threshold voltage. A comparator may incorporate the adaptive delay device to provide adaptive timing for the comparator functions thereby attaining improved noise performance and/or reduce power consumption.Type: GrantFiled: April 22, 2011Date of Patent: July 16, 2013Assignee: Analog Devices, Inc.Inventor: Ronald Kapusta
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Patent number: 8487260Abstract: The invention provides a sensor including a first sensor element formed in a first substrate and at least one optical element formed in a second substrate, the first and second substrates being configured relative to one another such that the second substrate forms a cap over the first sensor element, the at least one optical element being configured to guide incident radiation on the cap to the first sensor element. The sensor also includes a reference sensor element whose output can be used to reference the output of the first sensor element.Type: GrantFiled: October 20, 2006Date of Patent: July 16, 2013Assignee: Analog Devices, Inc.Inventors: William A. Lane, Eamon Hynes, Edward John Coyne
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Patent number: 8487710Abstract: A pulse width modulator based on a pair of rotary traveling wave oscillators. The first oscillator operates freely or as part of a phase-locked loop. The second oscillator operates at the same frequency as the first oscillator, but with a controllable phase offset from the first oscillator. The phase offset is set by an input voltage. A block takes the outputs of the first and second oscillators and combines them so that the output is a pulse whose width is the overlap of the oscillation signals from the first and second oscillators. The output pulse width is thus a function of the input voltage. When the pulse width modulator receives the input voltage from the output of a switching power supply, it can use the modulated pulse width to control the switching transistor of the power supply to maintain the output at a regulated voltage.Type: GrantFiled: December 12, 2011Date of Patent: July 16, 2013Assignee: Analog Devices, Inc.Inventors: Stephen Beccue, Andrey Martchovsky
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Publication number: 20130175669Abstract: A semiconductor device formed on a substrate includes a first diode junction formation, a second diode junction formation, and at least one through-silicon-via (TSV), in which a cathode and an anode of the first diode are cross-connected to an anode and cathode of the second diode through the at least one TSV for achieving electrical robustness in through-silicon-via based integrated circuits, including photosensitive devices and circuits for signal processing applications.Type: ApplicationFiled: March 6, 2013Publication date: July 11, 2013Applicant: Analog Devices, Inc.Inventors: Lejun HU, Srivatsan Parthasarathy, Michael COLN, Javier SALCEDO
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Publication number: 20130176152Abstract: An analog-to-digital converter system that includes a pipeline of successively-cascaded signal converters, each operating alternatively in a first circuit configuration and a second circuit configuration, an error estimator coupled to the pipeline to receive the digitized error for estimating an amplifier gain of the present signal converter stage, and a code aligner/corrector that temporally aligns and corrects the digital codes received from the successively-cascaded signal converters to provide a digital out of the ADC system.Type: ApplicationFiled: February 7, 2013Publication date: July 11, 2013Applicant: Analog Devices, Inc.Inventor: Ahmed Mohamed Abdelatty ALI
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Publication number: 20130175861Abstract: Embodiments of the present invention provide a system and method for controlling a power down functionality for a component while limiting the number of inputs to the component. Embodiments may include a single input that may serve the dual purpose of providing both an input analog signal and a power down control. According to an embodiment, the power down threshold may be set as the defined minimum operating input voltage such that any input signals below the operating range may be interpreted as a power down command. Alternate signal ranges may be defined as indicating a power down command. According to an embodiment, an input signal having an improperly high voltage may additionally be interpreted as a power down or other predefined command such that any input signals outside of the predefined operating range may be interpreted as a power down command.Type: ApplicationFiled: January 6, 2012Publication date: July 11, 2013Applicant: ANALOG DEVICES, INC.Inventor: John WYNNE
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Publication number: 20130177180Abstract: A MEMS microphone has a stationary portion with a backplate having a plurality of apertures, and a diaphragm spaced from the backplate and having an outer periphery. As a condenser microphone, the diaphragm and backplate form a variable capacitor. The microphone also has a post extending between, and substantially permanently connected with, both the backplate and the diaphragm, and a set of springs securing the diaphragm to at least one of the post and the stationary portion. The post is positioned to be radially inward of the outer periphery of the diaphragm.Type: ApplicationFiled: January 11, 2012Publication date: July 11, 2013Applicant: ANALOG DEVICES, INC.Inventors: Sushil Bharatan, Aleksey S. Khenkin, Thomas D. Chen
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Publication number: 20130168839Abstract: Apparatuses are disclosed, such as those involving integrated circuit packaging. In one embodiment, a chip package includes: an encapsulation having a top surface and a bottom surface facing away from the top surface. The package further includes a leadframe including a plurality of leads. Each of the leads includes an exposed portion exposed through one of edges of the bottom surface of the encapsulation. The exposed portion has a length. At least one of exposed portions positioned along one of the edges of the bottom surface of the encapsulation has a length different from other exposed portions along the edge. The package can also include a dummy pad exposed through a corner of the bottom surface. The configuration can enhance solder joint reliability of the package when the package is attached to a printed circuit board.Type: ApplicationFiled: March 1, 2013Publication date: July 4, 2013Applicant: ANALOG DEVICES, INC.Inventor: ANALOG DEVICES, INC.
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Publication number: 20130167642Abstract: An inertial sensor includes driving piezoelectric transducers for enabling an oscillation of a resonator, sensing piezoelectric transducers for enabling a detection of a movement of the inertial sensor, and piezoelectric compensating elements substantially equidistantly among the driving and the sensing piezoelectric transducers, wherein the compensating elements and the resonator form corresponding capacitors having capacitive gaps, and wherein, during the oscillation of the resonator, changes in electrostatic charges stored in the capacitors are measured with the compensating elements and are modified so as to modify the oscillation of the resonator.Type: ApplicationFiled: February 25, 2013Publication date: July 4, 2013Applicant: ANALOG DEVICES, INC.Inventor: Analog Devices, Inc.
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Publication number: 20130168675Abstract: Detecting and/or mitigating the presence of particle contaminants in a MEMS device involves including MEMS structures that in normal operation are robust against the presence of particles but which can be made sensitive to that presence during a test mode prior to use, e.g.Type: ApplicationFiled: February 25, 2013Publication date: July 4, 2013Applicant: Analog Devices, Inc.Inventor: Analog Devices, Inc.
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Publication number: 20130167639Abstract: An inertial sensor includes driving piezoelectric transducers for enabling an oscillation of a resonator, sensing piezoelectric transducers for enabling a detection of a movement of the inertial sensor, and piezoelectric compensating elements substantially equidistantly among the driving and the sensing piezoelectric transducers, wherein the compensating elements and the resonator form corresponding capacitors having capacitive gaps, and wherein, during the oscillation of the resonator, changes in electrostatic charges stored in the capacitors are measured with the compensating elements and are modified so as to modify the oscillation of the resonator.Type: ApplicationFiled: February 25, 2013Publication date: July 4, 2013Applicant: ANALOG DEVICES, INC.Inventor: Anolog Devices, Inc.
