HA12167FB Datasheet, PDF (30/73 Pages) Hitachi Semiconductor – Audio Signal Processor for Cassette Deck (Deck 1 Chip)

HA12167FB/HA12169FB
Figures 12, 13, and 14 show the characteristics when GP is controlled by a bias DAC.
60
E_DAC = 0 step
V_CC = 14 V
R_FM = 100 k Ω
R_FQ = 51 kΩ
50
B_DAC R_F/Q = 51 kΩ
R_GH = 33 kΩ
0
R_GL = 33 kΩ
R’_GP = 510 kΩ
40
R_ADJ = 20 kΩ
16
30
30
46
63
20
100
60
55
50
45
40
35
1k
Frequency (Hz)
10 k
30 k
Figure 12 Equalizer Gain vs. Frequency
R’_GP = 510 kΩ
R’_GP = 120 kΩ
R’_GP = 47 kΩ
E_DAC = 0 step
V_CC = 14 V
R_FM = 100 kΩ
R_FQ = 51 kΩ
R_F/Q = 51 kΩ
R_GH = 33 kΩ
R_GL = 33 k Ω
R_ADJ = 20 kΩ
30
0
10
20
30
40
50
60
70
B_DAC step
Figure 13 Equalizer Peak Gain vs. DAC Step Characteristics (1)
Rev.3, Jun. 1997, page 30 of 73