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High performance voice frequency amplifying circuit

A technology of audio amplifier circuit and amplification rate, which is applied in the direction of amplifier combination, etc., and can solve problems such as the increase of the output voltage of the loudspeaker

Active Publication Date: 2010-12-22
INVENSENSE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Typically, prior art loudspeaker amplification circuits for miniature loudspeakers have been designed to accommodate sound pressure levels up to a maximum (approximately 110dB SPL or lower) where the preamplifier is non-linear or clipping has limited further increases in the output voltage of the loudspeaker

Method used

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Embodiment Construction

[0142] Preferred embodiments of the invention will be described and discussed in the following paragraphs. The present embodiment of the present invention will be described in conjunction with an associated audio signal controller operatively connected to the present audio amplification circuit to illustrate the benefits and advantages of the present invention.

[0143] figure 1 is a schematic diagram of an audio amplification system 101 comprising two separate circuit parts in the form of an audio amplification circuit 102 and a controller or selection circuit 122, wherein the audio amplification circuit 102 is used as a front end and the controller or selection circuit 122 is used as an audio amplification The backend of the system 101 . As shown by the dotted dividing line 103, the audio amplifier circuit 102 and the signal controller 122 can be manufactured or realized on a common CMOS semiconductor die, or can be manufactured or realized on two different CMOS semiconduc...

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Abstract

The invention relates to a high performance voice frequency amplifying circuit comprising a first communication channel, a second communication channel, a first digital audio signal and a second digital audio signal; the first digital audio signal and the second digital audio signal are generated from a common audio input signal but differ from each other on the signal amplifying rate; the invention also provides a method to amplify a common audio input signal with different amplifying rates so as to further provide the first digital audio signal and the second digital audio signal which differ from each other on the signal amplifying rate. The voice frequency amplifying circuit is especially suitable to be equipped to receive or process the first and the second digital audio signals and cooperatively works with an integrated digital audio signals controller.

Description

technical field [0001] The present invention relates to an audio amplifier circuit having first and second signal channels which respectively generate first and second digital audio signals with different signal amplification ratios based on a common audio input signal. The invention also relates to amplifying a common audio input signal using different signal amplification ratios to provide first and second digital audio signals having different amplifications. The audio amplification circuit and amplification method are particularly suitable for cooperating with external and internal audio signal controllers configured to receive and process the first and second digital audio signals. Background technique [0002] Acceptable audio signal processing with a very large dynamic range poses a significant challenge to audio amplification and processing circuits, systems, especially for portable devices and applications such as mobile terminals, listening tools, headphones, recor...

Claims

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Application Information

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IPC IPC(8): H03F3/68
Inventor 亨里克·汤姆森延斯·约尔延·戈德·亨里克森克劳斯·菲尔斯特
Owner INVENSENSE
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