BA6387K Ver la hoja de datos (PDF) - ROHM Semiconductor

Número de pieza

componentes Descripción

Fabricante

BA6387K

Preservo amplifier for CD players

ROHM Semiconductor 

Optical disc ICs

!Circuit operation

(1) RF amplifier, FOK comparator

20k

0.01µ

24

23

22

−

+

45µ

10k

10k

20k

60k

25

−

2k

28

+

2k

BA6387K

26

2k

27

2k

60k

−

+

0.6V

Fig.2 RF and FOK block

−

12

+

RFO is shifted downwards from VB by 0.9V. However,

the resistance between pins 23 and 24 is set to 20kΩ

and if this resistance is changed use external

components to adjust the shift back to 0.9V. Have the

feedback resistance 10kΩ or greater. If the DC

component of RF rises 0.3V, then FOK becomes high.

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