CXA1797Q
CXA1797Q is Dolby B-C Type Noise Reduction System with Recording Equalizer Amplifier manufactured by Sony Semiconductor Solutions.
Description The CXA1797Q is an audio signal processing LSI designed for use in cassette decks. Functions include Dolby B-C noise reduction, recording equalizer amplifier, meter circuit (logarithmic), bias control circuit, and playback switching circuit. Serial control of these functions is possible. Features
- Few external parts
- Serial control of each functions possible
- Dolby B-C noise reduction
- Dolby S noise reduction select switch
- Recording equalizer amplifier
- Recording volume control
- Playback input select switch
- Meter circuit (logarithmic wave detection)
- Bias control circuit (left and right independent) Applications Cassette decks 64 pin QFP (Plastic)
Absolute Maximum Ratings (Ta=25°C)
- Supply voltage VCC +12 V (between VCC and VEE)
- Operating temperature Topr
- 20 to +75 °C
- Storage temperature Tstg
- 65 to +150 °C
- Allowable power dissipation PD 1.02 W Remended Operating Conditions Supply voltage VCC ±5.25 to ±6.0 Structure Bipolar silicon monolithic IC
∗This IC is available only to the licensees of Dolby Laboratories Licensing Corporation from whom licensing and applications information may be obtained. ∗"Dolby" and the double D symbols are trade marks of Dolby Laboratories Licensing Corporation.
Sony reserves the right to change products and specifications without prior notice. This information does not convey any license by any implication or otherwise under any patents or other right. Application circuits shown, if any, are typical examples illustrating the operation of the devices. Sony cannot assume responsibility for any problems arising out of the use of these circuits.
- 1-
E94X42-TE
Block Diagram
C10 3.9k R30 GND 22k C11 2.2µ GND R18 2k R28 (-6d Bm) 8.2k C9 2.2µ R29 R17 6.2k C6 3.3k MPX Filter Dolby R16 REC IN MOA OUT C14 200p -23d Bv R31 50k -8d Bv R51
Gm5
∗Source Impedance 10kΩ
-26d Bv 2.2µ
OSC Dolby S-NR Bias OSC
-6d Bv
TO LINE...
