9results about "Supply voltage control" patented technology

A squelch detector is provided by the present application. By configuring the first to third bias current sources (IB1, IB2, IB3) and a mirror ratio of the current mirror circuit, when an amplitude difference between first and second input signals (VIN, VIP) is smaller or greater than a squelch threshold, flip of an output node (D) in the squelch detector depends only on the squelch threshold and is independent of variations of process, voltage and temperature, PVT, parameters. Thus, the squelch detector can always provide reliable amplitude detection of input signals despite of possible variations of the PVT parameters.

A method for use in an audio system including a plurality of amplifier channels of a corresponding audio channel. Each of the amplifier channels receives a respective input audio signal and is powered by the same power supply. The method includes obtaining (810) a value of an indicator, the indicator representing an energy reserve of the power supply, and for each of the amplifier channels, determining (830) a gain to be applied to the respective input audio signal by an attenuation function and a clipping level to be applied to the output of the attenuation function by a clipping function, wherein when the value of the indicator is below a threshold, the gain decreases over time, when the value of the indicator is above the threshold, the gain increases over time to a maximum value, the threshold represents a nominal energy level at which the power supply is in a nominal operating state, and the clipping level is determined as a monotonic function of the value of the indicator.

A squelch detector is disclosed by the present application. By configuring the first to third bias current sources and a mirror ratio of the current mirror circuit, when an amplitude difference between first and second input signals is smaller or greater than a squelch threshold, flip of an output node in the squelch detector depends only on the squelch threshold and is independent of variations of process, voltage and temperature (PVT) parameters. Thus, the squelch detector can always provide reliable amplitude detection of input signals despite of possible variations of the PVT parameters.

A method and a device for processing information, a terminal device, and a storage medium are provided. The method for processing information includes: determining a current output voltage of a power supply module in a terminal device (S11); determining a target parameter of an audio processing module in the terminal device according to the current output voltage (S12); and configuring the audio processing module for processing an audio signal according to the target parameter (S13). With the embodiments of the present disclosure, an impact of a change of the output voltage of the power supply module on output volume of a loudspeaker can be reduced, thereby improving user experience.

The invention relates to an apparatus for adaptive boost voltage adjustment comprising a DC-DC control unit for controlling and adjusting an input voltage of a DC-DC boost converter connected to the DC-DC control unit, an amplifier for amplifying an audio input signal coupled to the amplifier and outputting an output signal coupled to a load, whereas the amplifier is powered by an adaptive DC-DC boost converter, and the adaptive DC-DC boost converter is powered by a battery, whereas the apparatus further comprises a battery monitoring circuitry which is configured to monitor an output voltage of the battery and to regulate an amplitude of the amplifier's output signal accordingly. The objective of the present invention to provide a cost-efficient and effective apparatus and a method that achieves an optimal power management between a battery monitoring circuitry and an adaptive DC-DC boost converter, thereby minimizing battery power consumption and enhancing overall battery life, is solved therein that the DC-DC control unit comprises an amplifier gain adjustment input for adjusting a boost voltage of the adaptive DC-DC boost converter based on the output of the battery monitoring circuitry (17).

According to an example aspect of the present invention, there is provided an audio amplifier for use with a limited power source, the audio amplifier having: a power input terminal, a signal input terminal, a first DC to DC converter having an input connected to the power input terminal, an electrical energy storage device connected to an output of the first DC to DC converter, a second DC to DC converter having an input connected to the electrical energy storage device, an amplifier conductively connected to the output of the second DC to DC converter so as to be powered by the output of the second DC to DC converter, the amplifier also being conductively connected to the signal input terminal so as to receive a signal for amplification, and an output of the amplifier configured to be connected to a transducer such that the transducer may be driven by the amplifier.

1. The invention relates to an apparatus for adaptive boost voltage adjustment comprising a DC-DC control unit for controlling and adjusting an input voltage of a DC-DC boost converter connected to the DC-DC control unit, an amplifier for amplifying an audio input signal coupled to the amplifier and outputting an output signal coupled to a load, whereas the amplifier is powered by an adaptive DC-DC boost converter, and the adaptive DC-DC boost converter is powered by a battery, whereas the apparatus further comprises a battery monitoring circuitry which is configured to monitor an output voltage of the battery and to regulate an amplitude of the amplifier's output signal accordingly. The objective of the present invention to provide a cost-efficient and effective apparatus and a method that achieves an optimal power management between a battery monitoring circuitry and an adaptive DC-DC boost converter, thereby minimizing battery power consumption and enhancing overall battery life, is solved therein that the DC-DC control unit comprises an amplifier gain adjustment input for adjusting a boost voltage of the adaptive DC-DC boost converter based on the output of the battery monitoring circuitry (17).

To provide a power supply circuit that operates stably, independent of a capacitance value of a smoothing capacitor.SOLUTION: The power supply circuit includes: a smoothing capacitor that is charged by a charging current from an output transistor and outputs a voltage generated by the charging as an output voltage; and a control loop that controls a conduction state of the output transistor according to a difference value between the output voltage and a reference voltage. The control loop includes: an AD conversion circuit; a duty adjustment circuit; a capacitance calculation circuit that outputs a control signal according to a capacitance value of the smoothing capacitor according to an error value output by the AD conversion circuit when a duty has been adjusted by the duty adjustment circuit, and a gain adjustment circuit that has a digital compensation circuit, an addition circuit, a PWM signal generation circuit, and a drive circuit, and adjusts the gain of the control loop by adjusting a compensation factor of the digital compensation circuit on the basis of the control signal.SELECTED DRAWING: Figure 1

A method for use in an audio system including a plurality of amplifier channels of corresponding audio channels. Each of the amplifier channels receives a respective input audio signal and is powered by a same power supply. The method comprises: obtaining a value of an indicator, wherein the indicator is representative of an energy reserve of the power supply; for each of the amplifier channels, determining a gain to be applied by an attenuation function to the respective input audio signal and a clipping level to be applied by a clipping function to the output of the attenuation function; wherein the gain decreases over time when the value of the indicator is below a threshold and the gain increases over time up to a maximum value when the value of the indicator is above the threshold, wherein the threshold is representative of a nominal energy level at which the power supply is in nominal operation; wherein the clipping level is determined as a monotonic function of the value the indicator.