Portable D-cells ----- Handheld Class D Amplifier

Handheld Class D Amplifier Handheld Class D Amplifier Keywords: Class D amplifier, handheld megaphone production, called a salange The portable D-class loudspeaker circuit is shown in Figure 1. This is a portable D-cell-based loudspeaker made with lock-locked rings CD4046 and TWH8751 high power switch integrated circuits (commonly known as loud public, called vendors, electric horn). The audio signal is input by the 9 pin of the IC2 phase-locked loop circuit. The internal voltage controlled oscillator VCO is converted into a variable-frequency wave, and then the internal phase comparator 1 is connected to the 2 pin output, and the IC3 is pushed by VT1, and then by the VT1 IC3 pushes the speaker pronunciation. When the IC2 phase-locked loop circuit has no signal input, the 2 pin output level is 0V, and IC3 stops working. In the circuit, VT1 is selected from 9014, VD1, and the IC1 op amp selects CA3160, IC2 phase-locked loop circuit selected CD4046, IC3 selects high-power switch integrated circuit TWH8751 produced by Dahua Electronics Factory, and also use high power field effect tube And Dalinton tube and other generations.

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