BA6387K 데이터 시트보기 (PDF) - ROHM Semiconductor
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BA6387K Datasheet PDF : 13 Pages
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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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