描述 Description

The CXA1878Q is a bipolar IC with a built-in Dolby B-C type noise reduction system (NR), Dolby S type select switch, recording/playback equalizer, electronic volume, and bias control circuit.

Use of this IC in combination with two CXA1417S/Q completes a Dolby B-C-S type NR stereo system.

特性 Features

? Dolby B-C type NR

? Built-in filter required for recording/playback equalizer amplifiers

? Recording mute function (requiring only an external time constant circuit to implement soft mute)

? Fade in/out DC controllable

? NORM/CrO2/METAL tape mode switching function

? NORM/HIGH tape speed switching function

? DC controllable for recording level calibration (approximately ±6dB variable)

? DC controllable for high frequency equalizer amplifier gain (approximately ±4dB variable)

? Playback deck A/B select switch

? Recording volume control

? Bias control circuit

? Meter circuit

Applications

Recording/playback equalizer amplifier for stereo analog cassette decks (Applicable to ALPS ELECTRIC CO., LTD. HADKH55 series heads)