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Device comprising a switching amplifier and a load

A switching amplifier and switching amplification technology, which is applied to amplifiers, amplifiers with semiconductor devices/discharge tubes, electrical components, etc., can solve problems such as damaged loudspeakers, high switching power, and dissipation, and achieve total power consumption reduction Small, long-playing effects

Active Publication Date: 2008-04-09
NXP BV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] This known device has other disadvantages due to the fact that the switching power in the high frequency domain is still relatively high
The switching power in this high frequency domain is dissipated in a load such as eg a loudspeaker and can damage this loudspeaker

Method used

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  • Device comprising a switching amplifier and a load
  • Device comprising a switching amplifier and a load
  • Device comprising a switching amplifier and a load

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Embodiment Construction

[0030] The prior art arrangement 100 shown in FIG. 1 comprises prior art switching amplifiers 200 , 300 and a load 4 . The prior art switching amplifier 200 , 300 includes a controller 200 and a switching amplifier 300 . The switching amplifier 300 includes four switches 31-34. The switch 31 is connected to the voltage source 11 and the first terminal 41 of the load 4 . The switch 33 is connected to the ground 12 and to the first terminal 41 of the load 4 . The switch 32 is connected to the voltage source 11 and the second terminal 42 of the load 4 . The switch 34 is connected to the ground 12 and the second terminal 42 of the load 4 . All switches 31-34 are controlled by a controller 200 comprising an input 21 for receiving an input signal to be amplified.

[0031]The timing and frequency diagrams shown in FIG. 2 of the prior art switching amplifiers 200 and 300 shown in FIG. 1 illustrate the performance of the prior art switching amplifiers 200, 300 (upper curve: x-axis ...

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PUM

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Abstract

Devices (1) comprising switching amplifiers (2,3) such as class D amplifiers and comprising loads (4) such as loud speakers are provided with controllers (2) for controlling switching circuits (3) for in respective four states introducing respective four voltage signals across the loads (4), which four voltage signals are different from each other. As a result, the switching power in the high frequency domain, which switching power is dissipated in the loads (4), is reduced. The total power consumption is reduced, which results in a longer playing time per battery. The controllers (2) control the switching circuits (3) for pulse width modulating the voltage signals in dependence of input signals and control the switching circuits (3) for in fifth states introducing fifth voltage signals across the loads (4), to further reduce the switching power and the dissipation in the loads (4) and the total power consumption and to further increase the playing time per battery.

Description

technical field [0001] The present invention relates to a device including a switching amplifier and a load, a switching amplifier, a controller used in a switching amplifier, a switching circuit used in a switching amplifier, and a switching amplification method and switching amplifier processor program products. [0002] Examples of such devices are mobile phones and other audio devices, and examples of such switching amplifiers are class D amplifiers. Background technique [0003] A known prior art switching amplifier is obtained from US 6,211,728 B1 which discloses a filterless switching amplifier comprising a control circuit for controlling four switches. The first switch connects the first end of the load to the voltage supply, the second switch connects the first end of the load to ground, the third switch connects the second end of the load to the voltage supply, and the fourth switch connects The second end of the load is connected to ground. By making the first ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/217
CPCH03F3/217
Inventor 纪尧姆·德克勒穆
Owner NXP BV
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