Audio Mixer

The AMU2481 Audio Mixer is a digital realtime signal processor in NMOS technology, housed in a 24pin Dil plastic package or in a 44pin PLCC package. It is de- signed to perform digital processing of both TV Audio in- formation and digital Audio data supplied by the DMA 2271 D2MAC Decoder. The architecture of the AMU2481 combines two main blocks: I/O blocks DSP block The I/O blocks are used to manage the input and output of Audio information. The DSP block consists of a mask programmable digital signal processor, whose software CAN be controlled by a Microprocessor (CCU) via the IM bus. So parameters like coefficients CAN be modified during performance. By means of the DSP software, au- dio functions, such as deemphasis, oversampling mix- ing and Volume Control are performed. Fig. 11 gives an overview over the AMUs functions. By Micronas
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AMU2481 Application circuits
AMU2481 circuits
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