TDA1581T Philips Semiconductors, TDA1581T Datasheet - Page 11

• Manufacturer Part Number: TDA1581T
• Description: Decoder for traffic warning VWF radio transmissions
• Manufacturer: Philips Semiconductors

Philips Semiconductors
FILTER INFORMATION
Gain
Amplifier conditions: G
Recommended components
March 1992
G
resonance frequency
gain at
quality
Q =
and
or
and
v
G
r
Decoder for traffic warning (VWF) radio
transmissions
=
C1, C2
R1, R2, R3
C1, C2
R1, R2, R3
=
vr
–
=
-----------------------------------------------------------------------------------------------------------------------------------
p
2
+
=
p
r
------------------------------------ -
R3 C1 C2
C1
+
o
>> G
C2
--------------------------------------------------------------------- -
--------------------- -
C1
R1 R2
--------------------- - R3 C1 C2
R1
C1 C2
--------------------- -
C1
C2
GENERAL EQUATION
--------------------- -
R1 C1
+
v
+
+
+
and G
C2
p
C2
R2
-----------------------------------------------------------------
R1 R2 R3 C1 C2
metallized polycarbonate film (MKC) capacitors; 5%
metal film (MR) resistors; 2%
metallized polyester film (MKT) capacitors; 5%
carbon film (CR) resistors; 2%
R3
------- -
R1
o
1
>> 2
R3 R1
------------------------------------- -
R1
R1 R2
+
Q
R2
2
+
R2
--------------------------------------------- -
C
1
-- -
2
1
-- -
2
11
, in which
R3 R1
------------------------------------- -
--------------------- - R3
R1
R1 R2
R3
------- -
R1
R1 R2
+
1
C1 = C2 = C
R2
+
p
R2
=
j
and G
v
=
V
----- -
V
o
i
------------------------------ -
C R2 R3
1
-- -
2
1
-- -
2
R3
------- -
R1
R3
------- -
R2
1
Preliminary specification
C1 = C2 = C
R2 << R1
TDA1581T