CXA1998 SONY [Sony Corporation], CXA1998 Datasheet - Page 22
CXA1998
Manufacturer Part Number
CXA1998
Description
Recording/Playback Equalizer Amplifier
Manufacturer
SONY [Sony Corporation]
Datasheet
1.CXA1998.pdf
(28 pages)
- Current page: 22 of 28
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3. AMS
(1) AMS output logic
AMS OUT (Pin 12) is an open collector output pin. When a 3.9 kΩ resistor is connected to V
Low: approximately 0.5V (I
High: 8V
Fig. 1 shows the AMS block diagram.
Fig. 2 shows the frequency response of the signal output from HPF.
AMS OUT (Pin 12)
Detection status
GAIN
(dB)
G
PB OUT1
PB OUT2
10
OL
Signal detection
= 2mA (max.))
Low
SA
f
C
1kHz
AMS GAIN
Fig. 2. Frequency Response
Fig. 1. AMS Block Diagram
25kHz
LPF
Inside IC
No signal detection
GND
9
– 22 –
100k
f (Hz)
HPF
High
V
CC
DET
11
V
CC
AMS TC
AMS OUT
25kHz
V
CC
12
GND
10
100kHz
AMS GND
CC
= 8V:
CXA1998AQ
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