Description
The CXA1897Q is an analog signal processing IC for tape recorders. It achieves whole processing operations for the recording and playback systems which include the Dolby B noise reduction function on a single chip. This IC supports 2 channels at each function.

Features
• Dolby B noise reduction supports 1.7 times normal speed.
• Recording/playback equalizer amplifier supports 1.7 times normal speed.
• Built-in comparator for AMS (automatic music sensor)
• Built-in AGC (automatic gain control) with amplifier for MPX filter.
• Playback equalizer outputs independently for DECK-A and DECK-B.
• Externally adjustable recording equalizer Gp and fp.
• Built-in Recording mute function.
• Double cassette dubbing system can be easily configured just with this IC.

Applications
    All analog signal processing in cassette deck parts of tape recorders and compact music centers (Sankyo Seiki mfg. Co., Ltd. YK47R-KF202 or equivalent which has the same head type.)