AN7354SC - Dolby B/C-type Noise Reduction
expresses that MODE is REC.
and NR is OFF.
The same for the following.
Note 2) Obtain the input voltage of REC.
* IN when the output voltage of REC.
* OUT becomes 388mVrms.
For this input voltage, the reference level in REC.
is assumed 0dB.
Note 3) Obtain the input voltage of PB.
ICs for Cassette, Cassette Deck AN7354SC Dolby B/C-type Noise Reduction s Overview The AN7354SC is an IC for 2 ch.
Dolby B/C-Type noise reduction process.
It requires fewer external parts and incorporates the functions of line-output muting and level detection and the delay circuit.
0.45 Unit : mm 1 42 skewing circuit not requiring external parts Line-output muting circuit built-in PB input delay circuit built-in Built-in level detection circuit for automat
AN7354SC Features
* Built-in spectral Delay Mute Rect Bias LOGIC Rect Delay Mute 1 + 1µF 2 22kΩ 3 + 1µF 4 5 6 7 2.4kΩ 8 9 10 11 + 12 0.1µF 13 + 1µF 14 MPX PB IN 1500pF 5.6kΩ NR C/B ON/ -type OFF Mute ON/OFF VEE REC. IN + 2.2µF 0.35±0.1 100kΩ AN7354SC s Absolute Maximum Ratings (Ta=25˚
