HA12163 Hitachi Semiconductor, HA12163 Datasheet - Page 18
HA12163
Manufacturer Part Number
HA12163
Description
Audio Signal Processor for Car Deck and Cassette Deck (Dolby B-type NR with PB Amp)
Manufacturer
Hitachi Semiconductor
Datasheet
1.HA12163.pdf
(66 pages)
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HA12163 Series
6. Note on Connecting with Tape Head to IC
Rev.4, Jun. 1999, page 18 of 66
This IC has no internal resistor to give the DC bias current to equalizer amp, therefore the DC bias
current will give through the head. This IC provides the Vref buffer output pin for Rch and Lch
separately (has two Vref terminal). In case of use that the Rch and Lch reference of head are
connected commonly, please use one of Vref terminals of IC (47 pin or 52 pin) for head reference.
If both 47 pin and 52 pin of IC are connected, rush current give the great damage to IC. The
application circuit is shown in figure 3.
Figure 3 Application Circuit
43
44
45
46
47
48
49
50
51
52
53
54
55
56
V
GND
GND
V
REF
REF
(L)
(R)
R/F
R/F
– +
– +
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