An integrated cinema amplifier comprises a power supply stage that distributes power over a plurality of channels for rendering immersive audio content in a surround sound listening environment. The amplifier automatically detects maximum and net power availability and requirements based on audio content by decoding audio metadata and dynamically adjusts gains to each channel or sets of channels based on content and operational/environmental conditions. A power supply stage provides power to drive a plurality of channels corresponding to speaker feeds to a plurality of speakers. The amplifier has a front panel having an LED array with each LED associated with a respective channel or group of channels of the multi-channel amplifier, and a control unit configured to light the LEDs according to display patterns based on operating status or error conditions of the amplifier.

A temperature compensation circuit comprises a temperature coefficient circuit that generates a temperature coefficient that is temperature dependent and a compensation circuit that generates a compensation signal based on an indication of temperature of an amplifier and the temperature coefficient, and based on the compensation signal, a gain of the amplifier is adjusted to improve amplifier linearity during data bursts.

An integrated cinema amplifier comprises a power supply stage that distributes power over a plurality of channels for rendering immersive audio content in a surround sound listening environment. The amplifier automatically detects maximum and net power availability and requirements based on audio content by decoding audio metadata and dynamically adjusts gains to each channel or sets of channels based on content and operational/environmental conditions. A power supply stage provides power to drive a plurality of channels corresponding to speaker feeds to a plurality of speakers. The amplifier has a front panel having an LED array with each LED associated with a respective channel or group of channels of the multi-channel amplifier, and a control unit configured to light the LEDs according to display patterns based on operating status or error conditions of the amplifier.

The present application provides a method of audio signal processing. The method comprises obtaining a voice coil direct current resistance of a speaker. The method further comprises obtaining an audio input signal to be input into the speaker. The method further comprises determining an audio input power based on the voice coil direct current resistance and the audio input signal. The method further comprises obtaining a thermal model of the speaker, and determining a transient power threshold based on the audio input power and the thermal model. The method further comprises determining a power constraint gain based on the audio input power and the transient power threshold. The method further comprises obtaining a voice coil temperature of the speaker. The method further comprises determining a temperature constraint gain based on the voice coil temperature and an upper operating temperature limit of the speaker. The method further comprises adjusting the audio input signal based on the power constraint gain and the temperature constraint gain, to obtain a target signal.

To avoid damage from overheating, playback device operation can be modulated based on input from temperature sensors. An example method includes obtaining, via one or more temperature sensors carried by the playback device, temperature data. Based on the temperature data, a first temperature parameter is detected. In response to detecting the first temperature parameter, a gain of audio playback is decreased by a first amount. After decreasing the gain of audio playback by the first amount, a second temperature parameter is detected. In response to detecting the second temperature parameter, the gain of audio playback is decreased by a second amount different than the first amount.

A power amplifier system having a power amplifier with a signal input and a signal output and bias circuitry is disclosed. The bias circuitry includes a bandgap reference circuit coupled between a reference node and a fixed voltage node. A bias generator has a bias input coupled to the reference node and a bias output coupled to the signal input. Also included is a first digital-to-analog converter having a first converter output coupled to the reference node, a first voltage input, and a first digital input, wherein the first digital-to-analog converter is configured to adjust a reference voltage at the reference node in response to a first digital setting received at the first digital input. The first digital setting correlates with an indication of temperature of the power amplifier.

An electronic device including: a modem configured to process a baseband signal; an intermediate frequency (IF) transceiver configured to convert the baseband signal provided from the modem into an IF band signal; and a radio frequency (RF) transceiver configured to convert the IF band signal provided from the IF transceiver into an RF band signal, wherein the RF transceiver includes a power amplifier configured to amplify the RF band signal, and a temperature sensor unit to detect a temperature of the power amplifier, and wherein the modem includes a controller configured to control an input power inputted to the RF transceiver based on the temperature of the power amplifier detected by the temperature sensor unit.

A circuit comprises an amplifier network including a first amplifier and a second amplifier and a first transistor having a first base. The first transistor is thermally isolated from the second amplifier. The circuit further comprises a second transistor having a second base. The second transistor is thermally linked to the second amplifier. The circuit further comprises coupling circuitry configured to couple the first base to the second base.

A temperature adaptive audio amplifier device includes a digital analog convertor, a gain controller, an amplifier, a temperature sensor and a decision circuit. The digital analog convertor transforms a digital audio signal into an analog convertor. The gain controller includes a gain value and is configured to perform gain processing on the analog audio signal and generate a gained analog audio signal. The amplifier is configured to amplify the gained analog audio signal and generates an amplified analog audio signal. The temperature sensor generates a temperature detect signal according to a junction temperature of the amplifier. The decision circuit receives the temperature detect signal and generates an adaptive gain adjustment signal to the gain controller. The adaptive gain adjustment signal is used to adjust the junction temperature of the amplifier to be within an upper temperature threshold and a lower temperature threshold.

A compensation circuit receives a sensing signal from a Hall sensor and outputs a compensated Hall sensing signal. The compensation circuit has a gain that is inversely proportional to Hall sensor drift mobility. The compensated Hall sensing signal is temperature-compensated.