A plosive sound elimination circuit

A technology to eliminate circuits and plosive sounds, applied in the direction of transducer circuits, electrical components, sensors, etc., can solve the problems of large discharge current, difficulty in ensuring accuracy, and limited precision, and achieve the elimination of plosive sounds, simple structure, and accuracy high degree of effect

Inactive Publication Date: 2011-12-21
BEIJING MXTRONICS CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This innovation improves upon previous methods for reducing unwanted acoustics caused when an electronic device starts up again after being turned off from standby (powered on). It eliminates any annoying clicks called pops while still providing accurate audio detection capabilities without requiring expensive components like ASIC chips. Additionally, it reduces energy usage due to lower voltages needed per unit area. Overall, these improvements improve overall performance and reduce costs associated therewith

Problems solved by technology

The technical problem addressed in this patented describes how to efficiently reduce unwanted acoustical pulsations caused by switching between different states while maintaining accurate detection over time without increasing leakage currents or decreasing efficiency due to increased dissipation power.

Method used

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  • A plosive sound elimination circuit
  • A plosive sound elimination circuit
  • A plosive sound elimination circuit

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Embodiment Construction

[0039] The present invention provides a plosive noise elimination circuit for audio digital-to-analog converters during power-on and power-off periods of output nodes, such as Figure 5 As shown, including resistor R1, resistor R2, resistor R7, resistor R8, PMOS transistor M1, PMOS transistor M12, PMOS transistor M9, NMOS transistor M10, NMOS transistor M11, comparator COMP, pull-up current source, pull-down current source and control Logic module, the specific circuit of the control logic module is as follows Figure 6 As shown, including two inverters, two AND gates, one OR gate and a buffer;

[0040] The control logic module includes two input terminals: a first input terminal in1 and a second input terminal in2; the first input terminal in1 receives a low power consumption signal,

[0041] Including four output terminals: the first output terminal rc, the second output terminal rr, the third output terminal ra and the fourth output terminal rd;

[0042] The first output ter

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Abstract

The invention provides an explodent elimination circuit. The explodent elimination circuit is used for explodent elimination during power on and power off of an output node of an audio digital-to-analog converter, and comprises four resistors, three positive channel metal oxide semiconductor (PMOS) transistors, two negative channel metal oxide semiconductor (NMOS) transistors, a comparator, a pull-up current source, a pull-down current source and a control logic module, wherein the pull-up current source and the pull-down current source slowly charge the output node or provide a discharge path and can effectively eliminate the explodent of the output node during power on and power off; and the adjustable voltage rise speed and voltage drop speed of the output node are ensured by a current source structure and feedback control. The invention has the characteristics that: the explodent elimination circuit can be widely applied to a power amplifier at the rear end of a single-bit audio digital-to-analog converter, a multi-bit audio digital-to-analog converter or the audio digital-to-analog converter, and can effectively eliminate the explodent caused by abrupt power on or power off of the output node of the audio digital-to-analog converter; the voltage rise time and the voltage drop time of the output node are controllable, complicated control logics are unnecessary, and the power consumption is low.

Description

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Claims

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Application Information

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Owner BEIJING MXTRONICS CORP
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