TZA1000 데이터 시트보기 (PDF) - Philips Electronics
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TZA1000 Datasheet PDF : 24 Pages
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Philips Semiconductors
QIC read-write amplifier
Preliminary specification
TZA1000
Table 8 HPF circuit
DIFF
0
1
HPF CIRCUIT
bypassed
on
Table 9 Variable gain circuit input select
HSM
HOLD
AI1
AI0
0
X
0
0
0
X
0
1
0
X
1
0
0
X
1
1
1
1
0
0
1
1
0
1
1
1
1
0
1
1
1
1
1
0
X
X
INPUT
servo preamplifier
preamplifier
bias output −10 dB
bias output −4 dB
servo preamplifier
preamplifier
bias output −10 dB
bias output −4 dB
servo preamplifier
Table 10 Bias circuit input
FBI1
0
0
1
1
FBI0
0
1
0
1
INPUT
no signal
preamplifier
test generator
preamplifier
Table 11 Preamplifier gain
PG1
0
0
1
1
PG0
0
1
0
1
GAIN
0
34 dB
4 dB
40 dB
Table 12 AGC setting
HSM
0
0
1
1
X
HOLD
1
0
1
0
X
GFXD
0
0
0
0
1
AGC
on
frozen at last value
on
no AGC at servo mode: maximum gain
off, gain set by G0 to G3; note 1
Note
1. Control bits G0 to G3 make up a 4-bit number used to program the gain in 1 dB steps (from 4 to 19 dB if G6DB is 0,
from 10 to 25 dB if G6DB is 1; see Table 13).
Table 13 Variable gain circuit range select
G6DB
0
1
RANGE
4 to 19 dB
10 to 25 dB
1998 Mar 17
11
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