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    Cholel Stone Mix Multimedia Sound ----- TDA8218 Power Amplifier

     

    Cholel Stone Mix Multimedia Audio, TDA8218 Power Amplifier Keywords: TDA8218, amplifier circuit The author makes a gallstone mixing multimedia audio, composed with bile duct 6jl and TDAB218AH Triple-swirl power amplifier. The audition is good, and the production process and steps will be written out with you. First, the front voltage amplification is 6J1.6J1 lines, the high and low frequency extension, the sound is warm and sweet, and the gall is rich, very sound. Here, it is connected to a triode, the screen pressure is 90V, and the cathode voltage is 2.6V. TDA8218AH is three-channel single-chip power amplification IC, mainly used for audio and large screen color TV audio systems, and built three independent power amplifiers, including two master amplifiers and a surround acoustic amplifier. The voltage is 20V, the load is 8 Ω, and the output power is 10W. The peripheral circuit is simple, the loading is easy, the signal to noise ratio is high, and the operating voltage is 10V ~ 30V. Second, the front stage voltage amplification requires a set of high pressure and a set of filament voltages to find a double 12V / 50W transformer for transformation. Unpack the secondary coil, calculate the number of volts per turn, 24V voltage is 6.3V and 17.7V. 17.7V voltage supply power amplifier, with a single 12V, small transformer and 6.3V winding, constitute a boost circuit to supply power to 6J1 male stage, voltage is approximately 130V, and the filament is 6.3V windings. Third, resistance, capacitance is general, and the two partition parameters are as consistent. The resistor uses 3W, and the other uses 1W, the polypropylene capacitance of the coupling capacitor, the electrolytic capacitance for filter capacitance is selected, and the transistor is fully bridge rectified. Fourth, heavy bass circuits and tonic control circuits consist with TL084 four operational amplifiers, or two NE5532 can also be better. With a 12V transformer separately supplies the operational amplifier, the whole machine circuit is shown in the drawings. Author: Zheng Xiangwei TDA8218 Data Download Address: http://html.allDataheet.com/html-pdf/25266/stmicroelectronics/tda8218/3247/2/tda8218.html

     

     

     

     

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