CIRRUS LOGIC, INC.
|CIRRUS LOGIC, INC. Patent applications|
|Patent application number||Title||Published|
|20150256953||SYSTEMS AND METHODS FOR ENHANCING PERFORMANCE OF AUDIO TRANSDUCER BASED ON DETECTION OF TRANSDUCER STATUS - Based on transducer status input signals indicative of whether headphones housing respective transducers are engaged with ears of a listener, a processing circuit may determine whether the headphones are engaged with respective ears of the listener. Responsive to determining that at least one of the headphones is not engaged with its respective ear, the processing circuit may modify at least one of a first output signal to the first transducer and a second output signal to the second transducer such that at least one of the first output signal and the second output signal is different than such signal would be if the headphones were engaged with their respective ears.||09-10-2015|
|20150256660||FREQUENCY-DEPENDENT SIDETONE CALIBRATION - A personal audio device includes a sidetone circuit with one or more adjustable coefficients that generates a sidetone signal from the output of a first microphone. The sidetone circuit has one or more adjustable coefficients for altering the relationship between the first microphone signal and the sidetone signal. The personal audio device also includes a transducer for reproducing playback audio and the sidetone signal at an ear of a listener and a second microphone for measuring the output of the transducer as delivered to the ear of the listener. The sidetone circuit includes a calibration circuit for estimating a response of the second microphone to the sidetone signal and adjusting the coefficient of the sidetone circuit according to the estimated response.||09-10-2015|
|20150256091||DIMMER OUTPUT EMULATION WITH NON-ZERO GLUE VOLTAGE - An apparatus may include a dimmer output voltage emulator for causing a power converter interface circuit to draw current from a capacitor in the power converter interface during a period of time when a dimmer coupled to the power converter interface circuit is non-conducting to generate an emulated dimmer output voltage. The emulated dimmer output voltage may emulate part of a cycle of a non-zero AC dimmer output voltage of the dimmer after a triac of the dimmer prematurely stops conducting that would occur if the triac continued conducting during the part of the cycle. The dimmer output voltage emulator may include a pull-down circuit to pull down current of the interface circuit and generally decrease the emulated dimmer output voltage during a first period of time and a hold circuit to maintain the emulated dimmer output voltage below a substantially non-zero threshold value during a second period of time.||09-10-2015|
Patent applications by CIRRUS LOGIC, INC.