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Push-pull linear hybrid class h amplifier

A push-pull amplifier, audio amplifier technology, applied in the direction of push-pull amplifiers, amplifiers, low-frequency amplifiers, etc.

Active Publication Date: 2012-01-25
AUDERA ACOUSTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similar to the previous scheme, the reproducible maximum symmetrical voltage is limited to + / -20V

Method used

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  • Push-pull linear hybrid class h amplifier
  • Push-pull linear hybrid class h amplifier
  • Push-pull linear hybrid class h amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] see first figure 1 , figure 1 An audio amplifier 100 according to a first embodiment is shown. The audio amplifier 100 includes an audio input terminal 112 , a push-pull amplifier output stage 108 , a split power supply 102 and a power control circuit 104 .

[0032] The audio input terminal 112 is typically connected to an audio source (not shown) that provides an input audio signal 114 . The input audio signal 114 may be a IV peak-to-peak signal having a time-varying magnitude and a time-varying frequency, or the input audio signal 114 may be any other type of analog audio signal.

[0033] Push-pull amplifier output stage 108 is connected to audio input terminal 112 to receive input audio signal 114 and to generate a corresponding amplified output audio signal 124 at audio output terminal 132 . A load 110 , such as a loudspeaker, is connected to the audio output terminal 132 to receive the amplified output audio signal 124 .

[0034] In amplifier 100 , push-pull am...

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PUM

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Abstract

Several push-pull linear hybrid class H amplifiers are disclosed. A split power rail provides a positive supply rail and a negative supply rail in response to a power supply control voltage. A push-pull amplifier stage is powered by the positive and negative supply rails. The amplifier stage receives an input signal and provides a corresponding amplified output signal. A power supply control circuit provides the power supply control voltage in response to the smaller of the positive and negative supply rails, and the input signal.

Description

technical field [0001] The described embodiments relate to audio amplifier circuits. In particular, the described embodiments relate to a push-pull linear hybrid class H audio amplifier circuit. Background technique [0002] Push-pull linear hybrid Class H audio amplifiers are typically powered by a split power supply that provides positive and negative rails. Typically, however, split power supplies have poor cross regulation, especially when the loads of the power supplies generating the power supply rails are different. For example, if one power supply is heavily loaded and the other is lightly loaded, the power supplies will not produce the same magnitude of power rail. This is usually caused by imperfect coupling of the transformer windings, stray inductance in the transformer and winding resistance. [0003] To compensate for poor cross-regulation between supply rails, conventional amplifier circuits include feedback loops that i) regulate the total voltage of the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/26
CPCH03F3/187H03F1/0227H03F2200/102H03F3/3076H03F2200/441H03F2200/504H03F3/68H03F2200/78H03F2200/411H03F2200/03H03F2200/33
Inventor J·B·弗伦奇A·梅森
Owner AUDERA ACOUSTICS