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Cirrus Logic Inc patents


Recent patent applications related to Cirrus Logic Inc. Cirrus Logic Inc is listed as an Agent/Assignee. Note: Cirrus Logic Inc may have other listings under different names/spellings. We're not affiliated with Cirrus Logic Inc, we're just tracking patents.

ARCHIVE: New 2018 2017 2016 2015 2014 2013 2012 2011 2010 2009 | Company Directory "C" | Cirrus Logic Inc-related inventors


Determining noise and sound power level differences between primary and reference channels

A method for estimating and minimizing a noise power level difference (NPLD) between a primary channel and a reference channel of an audio device, includes receiving, by a primary channel, an audio signal that has a speech signal level and a noise signal level; receiving, by a reference channel, the... Cirrus Logic Inc

Adjustable time duration for driving pulse-width modulation (pwm) output to reduce thermal noise

Noise introduced in an output signal of a pulse-width modulator (PWM) may be reduced by changing the time duration that a switch is driving the output node. Because the power supplies coupled to the switches are the source of noise in the output signal of the PWM, the time duration... Cirrus Logic Inc

Bandlimiting anti-noise in personal audio devices having adaptive noise cancellation (anc)

A personal audio device, such as a wireless telephone, includes noise canceling that adaptively generates an anti-noise signal from a reference microphone signal and injects the anti-noise signal into the speaker or other transducer output to cause cancellation of ambient audio sounds. An error microphone is provided proximate the speaker... Cirrus Logic Inc

Systems and methods for using a piezoelectric speaker as a microphone in a mobile device

In accordance with embodiments of the present disclosure, a device may include a piezoelectric speaker for generating sound, a microphone, and a controller communicatively coupled to the speaker and the microphone. The controller may be configured to receive a first signal from the piezoelectric speaker, the first signal induced at... Cirrus Logic Inc

Systems and methods for fabricating a polycrystaline semiconductor resistor on a semiconductor substrate

In accordance with embodiments of the present disclosure, an integrated circuit may include at least one region of shallow-trench isolation field oxide, at least one region of dummy diffusion, and a polycrystalline semiconductor resistor. The at least one region of shallow-trench isolation field oxide may be formed on a semiconductor... Cirrus Logic Inc

Systems and methods for using a speaker as a microphone

In accordance with methods and systems of the present disclosure, a mobile device may include an enclosure adapted such that the enclosure is readily transported by a user of the mobile device, a speaker associated with the enclosure for generating sound, and a controller within the enclosure, communicatively coupled to... Cirrus Logic Inc

Apparatus and measuring relative frequency response of audio device microphones

Test apparatus measuring relative frequency response of first and second microphones includes a rotatable carrier. First and second microphones are sealingly clamped against a mounting surface of the carrier aligned with first and second apertures therein, such apertures lying equidistant from, and on opposite sides of, the carrier's axis of... Cirrus Logic Inc

Adjustable time duration for driving pulse-width modulation (pwm) output to reduce thermal noise

Noise introduced in an output signal of a pulse-width modulator (PWM) may be reduced by changing the time duration that a switch is driving the output node. Because the power supplies coupled to the switches are the source of noise in the output signal of the PWM, the time duration... Cirrus Logic Inc

Systems and methods for compressing a digital signal

A system may include a delta-sigma analog-to-digital converter and a digital compression circuit. The delta-sigma analog-to-digital converter may include a loop filter having a loop filter input configured to receive an input signal and generate an intermediate signal responsive to the input signal, a multi-bit quantizer configured to quantize the... Cirrus Logic Inc

Systems and methods for compressing a digital signal

A system may include a delta-sigma analog-to-digital converter and a digital compression circuit. The delta-sigma analog-to-digital converter may include a loop filter having a loop filter input configured to receive an input signal and generate an intermediate signal responsive to the input signal, a multi-bit quantizer configured to quantize the... Cirrus Logic Inc

Power stage with switched mode amplifier and linear amplifier

A method for producing an output voltage to a load may include, in a power stage comprising power converter having a power inductor, a plurality of switches arranged to sequentially operate in a plurality of switch configurations, and an output for producing the output voltage comprising a first output terminal... Cirrus Logic Inc

Wireless earpiece with local audio cache

A wireless earpiece may include a local memory for storing audio files that can be played back by the user. The wireless earpiece may fit entirely within the user's ear canal. Audio files, for example music files, may be loaded on the wireless earpiece by docking the wireless earpiece with... Cirrus Logic Inc

Boost converter voltage controlled based on audio signal

Audio amplification may be improved by controlling an audio amplifier based on the audio signal being amplified. For example, when the audio signal level increases or decreases, a boost voltage provided to an audio amplifier by a boost converter may also be increased or decreased. In another example, when the... Cirrus Logic Inc

Systems and methods for dynamic range enhancement using an open-loop modulator in parallel with a closed-loop modulator

An integrated circuit may have two signal paths: an open-loop modulator (which may comprise a digital-input Class-D amplifier) and a closed-loop modulator (which may comprise an analog-input Class-D amplifier). A control subsystem may be capable of selecting either of the open-loop modulator or the closed-loop modulator as a selected path... Cirrus Logic Inc








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This listing is an abstract for educational and research purposes is only meant as a recent sample of applications filed, not a comprehensive history. Freshpatents.com is not affiliated or associated with Cirrus Logic Inc in any way and there may be associated servicemarks. This data is also published to the public by the USPTO and available for free on their website. Note that there may be alternative spellings for Cirrus Logic Inc with additional patents listed. Browse our Agent directory for other possible listings. Page by FreshPatents.com

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