MC13155 Motorola, MC13155 Datasheet - Page 6

• Manufacturer Part Number: MC13155
• Description: WIDEBAND FM IF
• Manufacturer: Motorola

two–port linear class A amplifier. The IF amplifier is
measured with a single–ended input and output configuration
in which the Pins 16 and 7 are terminated in the series
combination of a 47
ground (see Figure 14. S–Parameter Test Circuit).
(MAG) and angle (ANG). Also listed in the tables are the
calculated values for the stability factor (K) and the Maximum
6
In the S–parameters measurements, the IF is treated as a
The S–parameters are in polar form as the magnitude
resistor and a 10 nF capacitor to V CC
Input
IF
SMA
47
1.0n
1.0n
Figure 14. S–Parameter Test Circuit
C2
1
2
3
4
5
6
7
8
IN1
DEC1
V CC 1
DETO1
DETO2
V CC 2
LIMO1
QUAD1
MC13155
QUAD2
LIMO2
Available Gain (MAG). These terms are related in the
following equations:
where: I
where: K > 1. The necessary and sufficient conditions for
unconditional stability are given as K > 1:
DEC2
Buffer
V EE 1
V EE 2
RSSI
RSSI
MAG = 10 log I S 21 I / I S 12 I + 10 log I K – ( K 2 – 1) 1/2 I
IN2
K = (1– IS 11 I 2 – I S 22 I 2 + I
16
15
14
13
12
11
10
9
I = I S 11 S 22 – S 12 S 21 I.
B1 = 1 + I S 11 I 2 – I S 22 I 2 – I
1.0n
1.0n
C15
1.0n
MOTOROLA ANALOG IC DEVICE DATA
SMA
47
100n
10
IF
Output
I 2 ) / ( 2 I S 12 S 21 I )
+
V EE
I 2 > 0