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Calculating Gain for Audio Amplifiers (TI)
ABSTRACT
This application report explains the different types of audio power
amplifier configurations, such as the single-ended (SE), the bridge-tied
load (BTL) and the fully differential audio amplifier. Each configuration is
illustrated with a block diagram, gain equations, and an example using
realistic scenarios to illustrate to engineers how to calculate the gain of
their audio amplifier.
Contents :
1 Introduction ...........................................................................2
1.1 Power Into a Speaker..........................................................2
1.2 Speaker Impedance ............................................................2
1.3 Gain Setting for the Audio Power Amplifier ............................2
2 The Single-Ended (SE) Audio Power Amplifier .............................3
2.1 Design ..............................................................................3
2.2 Equation ...........................................................................3
2.3 SE Example........................................................................4
3 The Bridge-Tied Load (BTL) Audio Power Amplifier ......................6
3.1 Design ..............................................................................6
3.2 Equation ...........................................................................6
3.3 BTL Example.......................................................................7
4 The Fully Differential Audio Power Amplifier .................................9
4.1 Design ...............................................................................9
4.2 Equation ............................................................................9
4.3 Fully Differential Example.....................................................10
5 Conclusion..............................................................................13 |
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发表于 2011-12-19 21:59:22
