CXA2560 View Datasheet(PDF) - Sony Semiconductor
Part Name
Description
Manufacturer
CXA2560 Datasheet PDF : 19 Pages
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CXA2560Q
3. Playback equalizer amplifier
PB IN
FWD
RVS
AMP1
300k
Ri
PBFB PBTC PBOUT
PBREF
R1
C1
0.01µ
OUTREF
to TAPEIN
Fig. 3. Playback equalizer amplifier block diagram
The CXA2560Q configures the playback equalizer amplifier by connecting the external capacitor C1 and
resistor R1 shown in Fig. 3.
Two systems (FORWARD and REVERSE) of playback head input are provided for each channel.
The FORWARD input pin is selected when DRSW (Pin 19) is Low; REVERSE is selected when DRSW is
High.
The playback equalizer amplifier frequency response can be set in two levels (70µs/120µs).
When TAPESW (Pin 18) is Low, Ri is 7kΩ; when TAPESW is High, Ri is 12kΩ.
The gain can be adjusted by connecting VR between PBOUT (Pins 2 and 9) and OUTREF (Pin 3 and 28); or
by using VR for the external R1.
Gain [dB]
G1
T1
–6dB/oct
T2
T3
G1 = 20 log R1 + 300k
R1
G2, G3 = 20 log
R1 + Ri // 300k
R1
T1 = C1 · (300k + Ri)
G2
C1 · (R1 · 300k + 300k · Ri + Ri · R1)
T2, T3 =
R1 + R2
G3
f1
f2 f3
Frequency [Hz]
Fig. 4. Playback equalizer amplifier frequency response
– 13 –
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