1
Timothy Sheen, Ananth Jasty, Aurelio Ramos: System and method for device playback calibration. Sonos, McDonnell Boehnen Hulbert & Berghoff, August 11, 2015: US09106192 (41 worldwide citation)

Systems and methods are provided for device playback calibration. In one example, a calibration device with a microphone and signal processor may detect audio content rendered by a playback device. The calibration device may transmit the detected audio content to a processing unit configured to dete ...


2
Hilmar Lehnert, Timothy Sheen, Dayn Wilberding: Calibration error conditions. Sonos, McDonnell Boehnen Hulbert & Berghoff, January 3, 2017: US09538305 (12 worldwide citation)

Examples described herein involve identifying one or more error conditions during calibration of one or more playback devices in a playback environment. A microphone of a network device may detect and sample an audio signal while the one or more playback devices in the playback environment plays a c ...


3
Michael Nussbaum, Timothy Sheen, Daniel S Pearce: Versatile audio power amplifier. Bose Corporation, July 26, 2011: US07986187 (12 worldwide citation)

An audio power amplifier includes a first and a second amplification unit, each including a switching voltage amplifier, an output filter, a current compensator, an inner current feedback loop feeding a measurement of current measured at the output inductor back to a summing input of the current com ...


4
Timothy Sheen, Dayn Wilberding: Speaker calibration. Sonos, McDonnell Boehnen Hulbert & Berghoff, June 27, 2017: US09690271 (9 worldwide citation)

An example implementation may involve a control device displaying (i) a prompt to prepare a playback device for calibration within a given environment, (ii) a prompt to prepare the given environment for calibration of the playback device, and (iii) a prompt to prepare the control device for calibrat ...


5
Michael Nussbaum, Timothy Sheen, Daniel S Pearce: Versatile audio power amplifier. Bose Corporation, February 26, 2013: US08384478 (2 worldwide citation)

An audio power amplifier with a four-quadrant power supply having a synchronous output rectifier that includes a planar transformer. The amplifier includes a first amplification unit including a switching voltage amplifier with a command signal input and an amplified signal output. Control electroni ...


6
Timothy Sheen: Reducing pulse error distortion. Bose Corporation, February 19, 2013: US08378743 (2 worldwide citation)

A class D amplifier that includes circuitry to apply a non-linear correction to pulse error distortion. The amplifier includes an output voltage controlling circuit, comprising at least two switches, controlled by a modulator; an output inductor, coupling the switching circuit to an output terminal; ...


7
Michael Nussbaum, Timothy Sheen, Daniel Scott Pearce: Versatile audio power amplifier. Bose Corporation, December 30, 2014: US08922278 (1 worldwide citation)

An audio power amplifier includes a first and a second amplification unit, each including a switching voltage amplifier, an output filter, a current compensator, an inner current feedback loop feeding a measurement of current measured at the output inductor back to a summing input of the current com ...


8
Timothy Sheen: Power supply transient response improving. Bose Corporation, January 8, 2013: US08350537 (1 worldwide citation)

A power factor correcting power supply. The power factor correcting power supply includes a controlled current source for providing electrical power of a regulated current and a regulated voltage to a first output terminal, a voltage comparison current controller, and a control circuit responsive to ...


9
Michael Nussbaum, Timothy Sheen, Daniel S Pearce: Versatile audio power amplifier. Bose Corporation, Bose Corporation, October 15, 2013: US08558618 (1 worldwide citation)

An audio power amplifier includes a first and a second amplification unit, each including a switching voltage amplifier, an output filter, a current compensator, an inner current feedback loop feeding a measurement of current measured at the output inductor back to a summing input of the current com ...


10
Michael Nussbaum, Timothy Sheen, Daniel Scott Pearce: Versatile audio power amplifier. Bose Corporation, January 13, 2015: US08933753 (1 worldwide citation)

An audio power amplifier includes a first and a second amplification unit, each including a switching voltage amplifier, an output filter, a current compensator, an inner current feedback loop feeding a measurement of current measured at the output inductor back to a summing input of the current com ...