TL441-EP_14 Datasheet, PDF (2/19 Pages) Texas Instruments – LOGARITHMIC AMPLIFIER

TL441ĆEP
LOGARITHMIC AMPLIFIER
SGLS268 − OCTOBER 2004
FUNCTIONAL LOGIC DIAGRAM (one half)
A1
(B1)
Σ
Log
−15 dB
Log
CA2
(CB2)
A2
Log
(B2)
−15 dB
Y (Z)
Y (Z)
Log
CA2_′
(CB2_′)
Y ∝ log A1 + log A2; Z ∝ log B1 + log B2 where: A1, A2, B1, and B2 are in dBV, 0 dBV = 1 V.
CA2, CA2_′, CB2, and CB2_′ are detector compensation inputs.
SCHEMATIC
8
VCC ₊
6
Y
5
Y
7
A2
4
A1
3
CA2_′
1
CA2
2
VCC _−
10
Z
11
Z
9
B2
12
B1
13
GND
14
CB2_′
15
CB2
2
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