Homemade multi-sound audio system ----- UPC1892 Application

Homemade multi-sound audio system, UPC1892 Application Keywords: UPC1892, audio effect circuit application Author: Tao Ruyi The entire circuit is divided into two parts: the first part uses the four-way surround-surrounding chip μPC1892 produced by Japan NEC (see the figure below), and there is an amplifier, low pass filter, pattern control, phase shift, effect processing, compensation absorption. , Tone, volume, and balance and other circuits. The (25), (26) of the chip is the input of the left and right channel signals. After the internal circuit is amplified, it is divided into four signals from (9), (12) to (14), respectively, by the first The four-way power amplifier of the second part (see Figure 2) can produce a wonderful four-dimensional surround sound effect. The chip also presupposes the concert hall, the cinema and the simulated stereo three sound field effects. The sound field effect switches through the level of the chip (7), the (8) pin, as shown in the following table. In use can be selected by S1, S2. The potentiometer RP1 is the music effect control. RP2 is output level control, and RP3 is the front left and right channel volume control. RP4 is a rear surround sound control, and RP5 is bass control, RP6 is treble control. Effect pattern pin serial number 7 feet 8 foot Off (no effect) low low level Concert hall effect high low level Cinema effect low high level Simulated stereo effect high level high level The second portion shown below is composed of a small-length component of the peripheral component and the fool 275. D-200 maximized output power up to 200W, rated no distortion output power up to 100W, 55 ± 5V in operating voltage range. The fool 275 module uses the power supply voltage to ± 15V ~ ± 32V, the limit operating voltage is not more than ± 34V.

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