10results about "Limiting amplitude without controlling loop" patented technology

The present application discloses an audio signal processing method and an audio signal processing device for carrying out the audio signal processing method. The audio signal processing method comprises: receiving an audio signal and compressing the audio signal to produce a first compressed signal; calculating a duration for which a power value of the first compressed signal equals a first power threshold; determining whether the duration exceeds a first time threshold; if the duration exceeds the first time threshold, compressing the first compressed signal to produce a second compressed signal; and amplifying and outputting the second compressed signal. The method described above reduces the volume and prevents damage to electronic components during prolonged high-power operation of the loudspeaker system.

This application relates to methods and apparatus for power limiting for amplifiers. An amplifier is configured to receive an input supply voltage and to draw, in use, an amplifier input current resulting in an amplifier input power. A power limiter is configured to monitor an indication of the amplifier input power, determine a first signal limit based on said indication of the amplifier input power and a pre-set limit and apply regulation to the input signal to provide a regulated input signal for input to the amplifier that does not exceed the first signal limit.

An amplifier apparatus 100 for outputting an output signal Vout based on an input signal Sin. The apparatus having an amplifier 101 configured to receive an input supply voltage VP and drawing an ampl

An amplifier 1 suitable for amplifying audio signals comprises a plurality of stages. At least two stages of the plurality of stages are a first stage 10 and a second stage 20 connected in series. The

An amplifier circuit arrangement for amplifying at least one input signal to an output signal for delivery to a load. The amplifier circuit arrangement includes at least one four-port hybrid coupler, a main amplifier having an input terminal for receiving a first input signal and coupled to a first port of the hybrid coupler, an auxiliary amplifier having an input terminal for receiving a second input signal and coupled to the second port of the hybrid coupler, a negative resistance amplifier circuit coupled to the third port of the hybrid coupler. The negative resistance amplifier circuit receives a signal from the hybrid coupler via the third port and returns an amplified signal back to the third port of the hybrid coupler. At least one of the auxiliary amplifier and negative resistance amplifier circuit selectively operates in combination with the main amplifier circuit.

An audio interface system is disclosed that receives an audio signal from an audio line and outputs a normalised audio signal. An audio interface device of the audio interface system comprises a signal conditioning module, a gain module to apply a gain to the audio signal and an attenuation module to apply an attenuation to the audio signal to output the normalised audio signal. The audio interface device further comprises an interface configured to communicate the normalised signal to an external device. In response to determining that an amplitude of the audio signal does not meet a minimum amplitude requirement or exceed a maximum amplitude requirement, the signal conditioning module is to adjust the amplitude of the audio signal by applying the gain and / or attenuation to meet the requirement.

Limiter (2) for high-frequency signals, comprising an input (5) and an output (6) electrically connected to the input (5) via a line section (9), wherein a high-frequency signal is supplied to the limiter (2) at its input (5), wherein the limiter (2) has at least one limiting stage (8; 81, 82, 83, 84, 8 5, 86) which is electrically connected to the input (5), where the limiting level (8; 81, 82, 83, 84, 8 5, 86) a series circuit comprising a non-biased diode (10; 101, 102, 103, 104, 105, 106) and a Zener diode (11; 111, 112, 113, 114, 115, 116), which does not serve to bias the diode, so that the high-frequency signal is electrically connected to a reference ground via the one non-biased diode (10; 101, 102, 103, 104, 105, 106) and the Zener diode (11; 111, 112, 113, 114, 115, 116), characterized by that via at least one switch (413, 414) the at least one limiting stage (8; 81, 82, 83, 84, 8 5, 86) is detachably connected to the line section (9).

An audio interface system is disclosed that receives an audio signal from an audio line and outputs a normalised audio signal. An audio interface device of the audio interface system comprises a signal conditioning module, a gain module to apply a gain to the audio signal and an attenuation module to apply an attenuation to the audio signal to output the normalised audio signal. The audio interface device further comprises an interface configured to communicate the normalised signal to an external device. In response to determining that an amplitude of the audio signal does not meet a minimum amplitude requirement or exceed a maximum amplitude requirement, the signal conditioning module is to adjust the amplitude of the audio signal by applying the gain and / or attenuation to meet the requirement.

A system for high voltage protection may comprise a high voltage protection module electrically connected to a transmitter module and a receiver module and a muting module connected to the high voltage protection module and the receiver module. A method for high voltage protection may comprise disposing a downhole tool into a wellbore, transmitting an excitation signal from the transmitter module to transceiver as a high voltage pulse signal to the high voltage protection module, reducing the high voltage pulse signal with the high voltage protection module, and preventing saturation of the receiver with a low impedance interface from the muting module.

The present invention relates to a RF amplifier circuit arrangement for amplifying at least one RF input signal to an output signal for delivery to a load. The RF amplifier circuit arrangement uses a simple and low-cost RF clipping circuit within a load modulated balanced amplifier arrangement which passes RF input signals to output linearly up to the signal input reaches a predefined amplitude. Beyond that predefined amplitude the clipping circuit clips excess amplitudes. The present invention further relates to an electronic device.