Carrier phase shifted pulse width modulation type digital power amplifier and power amplification method
A technology of pulse width modulation and carrier phase shift, which is applied in the field of high-power digital power amplifiers and power amplification, can solve problems such as deterioration of digital power amplifier distortion, unbalanced voltage and current, and increase in equivalent input capacitance. Effects of extended maintenance, distortion enhancement, volume reduction
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[0034] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. In the following, the present invention will be further described in conjunction with the implementation circuit examples of each module, but this does not constitute any limitation to the present invention. In practice, these circuit forms can be constructed and changed differently.
[0035] In this embodiment, m=4.
[0036] refer to figure 1 , 2 , The carrier phase-shift pulse width modulation digital power amplifier of the present invention is composed of a digital power amplifier controller, a drive circuit module, a power amplifier main circuit and a filter module. The digital power amplifier controller is used to complete the sampling of the analog audio signal, and perform PWM pulse width modulation with 8 digital triangular carriers with the same frequency and a phase difference of π / 4 in turn to generate 8 groups of PWM control signa...
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