CXD2724AQ-1中文資料索尼數(shù)據(jù)手冊PDF規(guī)格書

Description

The CXD2724AQ-1 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. 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, 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

Functions

? Adaptive matrix

? Center channel mode control (Normal/Phantom/Wide)

? Dolby 3 Stereo

? Auto input balance control (ON/OFF)

? Noise sequencer

? Variable delay time (0 to 34.8ms)

? 7 kHz low-pass filter (12dB/Oct)

? Modified Dolby B-type NR

? Simple SFC function

? Virtual Dolby Surround

? SFC mode

? DSP bypass mode (L, R-channel through)

Applications

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