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Description

The CXD2728Q is a CMOS LSI developed for Dolby Pro Logic Surround. A SRAM for short delay and AD/DA converters are built in, and all functions necessary for Dolby Pro Logic Surround such as an adaptive matrix, a passive decoder including Modified Dolby B-type NR, auto input balance, a noise sequencer and center channel mode control are contained on a single chip. Further, this LSI also supports Dolby 3 Stereo and Virtual Dolby Surround.

Features

? Dolby Pro Logic Surround decoding with a single chip

? 2-channel 1-bit AD converter and decimation filter

? 4-channel 1-bit DA converter and oversampling filter

? 32K-bit SRAM for short delay

? No separation or other variance for digital processing

? External parts reduced due to the built-in AD/DA converters

Applications

Equipment having Dolby Pro Logic Surround function such as AV amplifiers, receivers and compact music systems