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Description

The CXD2719Q 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 BNR, auto input balance, a noise sequencer and center channel mode control are contained on a single chip.

Features

? Dolby Pro Logic Surround decoding with a single chip

? 2-channel 1-bit AD converter, decimation filter and prefilter operational amplifier

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

? Analog switch for DSP bypass

? Analog electronic attenuator (+1.5 to –29.5dB) for center/surround channel trim

? 24K-bit SRAM for short delay

? No separation or other variance for digital processing

? External parts reduced by incorporating analog circuits

Applications

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