17results about "Supply voltage control" patented technology

The present invention relates to a radar system for a vehicle, a method for controlling a radar system, a computer program product, and a vehicle comprising such a radar system. The radar system comprises an antenna arrangement for transmitting and / or receiving electromagnetic waves, a power supply connected to the antenna arrangement, the power supply being arranged to supply the antenna arrangement with operating power. The radar system further comprises an antenna controller connected to the antenna arrangement, the antenna controller being configured to control an operation of the antenna arrangement. The radar system also comprises an auxiliary power source connectable to the antenna arrangement for supplying the antenna arrangement with supplementary operating power so to increase an output power of the antenna arrangement, and a boost controller connected to the auxiliary power source and to the antenna controller, the boost controller being configured to connect and disconnect the auxiliary power source to / from the antenna arrangement. Hereby presenting a radar system capable of increasing the maximum range of the antenna arrangement during an arbitrary period of time without suffering from too heavy penalties in terms of increased weight or cost.

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.

Methods, systems, and devices for wireless communication are described. A network entity may output a measurement configuration for measuring signal power at a receiving device (e.g., a wireless communication device, a UE, a receiving network node) based on a capability of the device. The receiving device may measure a signal power in accordance with the configuration, and may determine an interference power headroom (IPH) corresponding to a difference between an expected power level, or threshold signal power level before a signal performance is reduced, and the measured signal power level. The device may transmit an IPH report to the network entity indicating the IPH, and the network entity may use the IPH report to signal recommended adjustments for a voltage swing or other parameters, or to adjust a schedule for one or more communications to mitigate interference or reduce a power consumption at one or more devices.

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 compensation method for a characteristic difference of a photoelectric element is disclosed. The method includes (S1) providing a test substrate with a connector, a photoelectric element and a plurality of gain units, wherein the plurality of gain units are connected in parallel; (S2) connecting the connector to a test fixture which includes a test resistor and a test control unit, wherein when the test fixture is connected with the connector, the test resistor is electrically connected between the second pin and the third pin; (S3) providing input power to the connector so as to generate a test voltage on the photoelectric element; (S4) selecting the corresponding gain unit according to the test voltage and a classification data table; (S5) driving a production line to connect the first contact and the second contact of the selected gain unit.

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.

Provided are an audio amplification circuit, a board, and an electronic device. The circuit includes: a boost module and an audio amplifier, where the audio amplifier includes a pre-module and a post-module; an input end of the boost module is connected to a power supply, an output end of the boost module is connected to an input end of the pre-module, and an input end of the post-module is connected to the power supply; the boost module is configured to boost a first voltage signal when a voltage value of the received first voltage signal of the power supply is less than a first preset voltage value to obtain a second voltage signal whose voltage value is a second preset voltage value, and send the second voltage signal to the input end of the pre-module, where the second preset voltage value is not less than the first preset voltage value. A power loss is reduced by using the circuit.

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.

The present invention discloses a millimeter-wave load modulation balanced amplifier based on a variable cross-coupled pair, which is characterized by comprising an adaptive bias circuit, a first balanced-end amplifier module, a second balanced-end amplifier module, a control-end amplifier module, a first driver amplifier module, a second driver amplifier module, a third driver amplifier module, a variable cross-coupled pair, a resistor R5, a resistor R6, a differential 90° coupler Q1, a differential 90° coupler Q2 and a differential 90° coupler Q3; compared with only using the adaptive bias technology, the combination of the structure of the variable cross-coupled pair proposed by the present invention and the adaptive bias can improve the overall linearity of the load modulation balanced amplifier and will not deteriorate the efficiency in the power back-off region.

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.

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).

Described herein are systems and methods that can adjust the performance of a transimpedance amplifier (TIA) in order to compensate for changing environmental and / or manufacturing conditions. In some embodiments, the changing environmental and / or manufacturing conditions may cause a reduction in beta of a bipolar junction transistor (BUT) in the TIA. A low beta may result in a high base current for the BUT causing the output voltage of the TIA to be formatted as an unusable signal output. To compensate for the low beta, the TIA generates an intermediate signal voltage, based on the base current and beta that is compared with the PN junction bias voltage on another BUT. Based on the comparison, the state of a digital state machine may be incremented, and a threshold base current is determined. This threshold base current may decide whether to compensate the operation of the TIA, or discard the chip.

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.

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