HA12207 查看數據表（PDF） - Hitachi -> Renesas Electronics

零件编号

产品描述 (功能)

生产厂家

HA12207

Audio Signal Processor for Cassette Deck

Hitachi -> Renesas Electronics 

HA12207NT

Level Block Diagram

The gain establishment of PB-EQ considers PB output level {(external AMP+PB AMP)=300mV(Dolby

Level)} like figure 3 as the target.

Regarding REC-EQ adjust the gain in front of input to this IC.

The level diagram of 1kHz is shown figure 4. (Normal speed)

Similarly to PB, it consider Dolby level as a standard. And R1 needs the value more than 5.6kΩ.

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.

300mV

(Dolby level)

HA12134A

63.6mV

0.6mV

40.5dB

PB-EQ

20dB

Dolby IC

Figure 3 PB Level Block Diagram (Normal Speed, 1kHz)

Rev.3, Jun. 1999, page 9 of 27

Share Link: