Invention Grant
- Patent Title: Distortion suppression in high-level capable audio amplification circuit
- Patent Title (中): 高能级音频放大电路中的失真抑制
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Application No.: US13302288Application Date: 2011-11-22
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Publication No.: US08855335B2Publication Date: 2014-10-07
- Inventor: Jens Jorgen Gaarde Henriksen
- Applicant: Jens Jorgen Gaarde Henriksen
- Applicant Address: US CA San Jose
- Assignee: Invensense, Inc.
- Current Assignee: Invensense, Inc.
- Current Assignee Address: US CA San Jose
- Agency: IPxLaw Group LLP
- Agent Maryam Imam
- Main IPC: H03F99/00
- IPC: H03F99/00 ; H03F3/68 ; H04R3/06 ; H03F3/187 ; H03F1/32 ; H03F3/45 ; H03M1/06 ; H03M1/00 ; H04R19/00 ; H04R19/04 ; H03G3/30

Abstract:
The present invention relates to an audio amplification circuit comprising a first preamplifier for receipt of an audio input signal and a second preamplifier comprising a first differential input for receipt of an attenuated audio input signal. The attenuated audio input signal is generated by an attenuator coupled to the audio input signal. A non-linear element is coupled to a first input of the first preamplifier thereby distorting the audio input signal at the first input at large signal levels. A distortion compensation network is adapted to supply a distortion compensation signal from the first input of the first preamplifier to a second differential input of the second preamplifier such that distortion in the output signal of the second preamplifier is cancelled or attenuated. The invention further relates to a corresponding method of compensating an audio amplification circuit for distortion induced by a non-linear element.
Public/Granted literature
- US20120121106A1 DISTORTION SUPPRESSION IN HIGH-LEVEL CAPABLE AUDIO AMPLIFICATION CIRCUIT Public/Granted day:2012-05-17
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