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CXA1911 Scheda tecnica(PDF) 11 Page - Sony Corporation

Il numero della parte CXA1911
Spiegazioni elettronici  Dolby B/C Type Noise Reduction System with Playback Equalizer
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Produttore elettronici  SONY [Sony Corporation]
Homepage  http://www.sony.co.jp
Logo SONY - Sony Corporation

CXA1911 Scheda tecnica(HTML) 11 Page - Sony Corporation

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—11—
CXA1911Q
Description of Operation
1. Signal route
Fig. 1
Op1 and Op2 are operational amplifiers.
Op1 composes the playback equalizer by attaching a resistor and a capacitor to PBFB pin, and a
capacitor to PBTC pin.
Op2 is an input selector and a LINEOUT amplifier. The gain is 24 dB.
The Dolby reference level is –6 dBm (LINEOUT).
The adjustment method of playback equalizer is described in the paragraph (3).
Note)
Usually the TAPEIN pin level is adjusted by attenuator connected to PBOUT pin.
The capacitance value connected to PBFB can be reduced by adjusting the resistance
connected to PBFB to match the PBOUT level.
With this method, the capacitance value can be reduced according to the amount that the
resistance value is increased even for the same cut-off frequency.
(These specifications use the latter method.)
Op2
4dB
20dB
20dB
NR OFF
NR ON
Op1
PBFB PBTC
PBOUT
TAPEIN
Dolby level
(–6dBm)
LINEOUT
PBIN
F
R
NR


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