akira CT-21CBP5CP, Руководство по обслуживанию

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Model no.: .CT-21CBP5CP.doc
version 1.0
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1.5 Audio effect processor TDA7449
TDA7449 TONE CONTROLDIGITALLY
CONTROLLED AUDIO PROCESSOR INPUT
MULTIPLEXER
1) Features
-2 stereo inputs
- selectableinput gain for optimal Adaptationto
different sources One stereo output Treble, and bass
control in 2.0db Steps Volume control in 1.0db steps
Two speaker attenuators:
-two independent speaker control In
1.0dbsteps for balance facility
-independent mute function All function are
programmable via Serial Bus
2) Descripion
T
he TDA7449 is a volume tone (bass and treble) Balance (left/right) processor for quality
audio Applications in TV systems.Selectable input gain is provided. Control of all The
functions is accomplished by serial bus. The ac signal setting is obtained by resistor
networks And switches combined with operational Amplifiers. Thanks to the used
bipolar/cmostechnology, Low distortion, low noise and dc stepping are Obtained.
3) Block Diagram
Fig.15