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HA12219NT View Datasheet(PDF) - Hitachi -> Renesas Electronics

Part Name
Description
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HA12219NT
Hitachi
Hitachi -> Renesas Electronics Hitachi
HA12219NT Datasheet PDF : 29 Pages
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HA12219NT
Level Block Diagram
The gain establishment of PB-EQ considers PB output level
{(external AMP+PB AMP <HA12136A>) = 580 mV (Dolby Level)} like figure 3 as the target.
Regarding REC-EQ adjust the gain in front of input to this IC.
Similarly to PB, it consider Dolby level as a standard. And R1 needs the value more than 5.6 k.
Because mode establishment resistances are built-in, REC-EQ frequency characteristics are respectively
fixed value.
In case the change of the frequency characteristics are necessary, please inquire the responsible agent
because the adjustment of resistors is necessary.
580 mV
(Dolby level)
HA12136A
63.6 mV
0.6 mV
40.5 dB
PB-EQ
26 dB
Dolby IC
Figure 3 PB Level Block Diagram (120 µs, 1 kHz)
Rev.2, Jul. 1998, page 9 of 29
 

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