MC13155D 查看數據表（PDF） - LANSDALE Semiconductor Inc.

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MC13155D

Wideband FM IF

LANSDALE Semiconductor Inc. 

ML13155

LANSDALE Semiconductor, Inc.

In the S–parameters measurements, the IF is treated as a

two–port linear class A amplifier. The IF amplifier is meas-

ured with a single–ended input and output configuration in

which the Pins 16 and 7 are terminated in the series combina-

tion of a 47 resistor and a 10 nF capacitor to VCC ground

(see Figure 14. S–Parameter Test Circuit).

The S–parameters are in polar form a the magnitude (MAG)

and angle (ANG). Also listed in the tables are the calculated

values for the stability and factor (K) and the Maximum

Available Gain (MAG). These terms are related in the follow-

ing equations:

K = (1–IS11 I2–IS22I2 + I∆I2)/(2 I S12 S21 I)

where: I ∆ I = I S11 S22–S12 S21 I.

MAG = 10 log I S21 I/I S12 I + 10 log I K–(K2–1)1/2 I

where: K >1. The necessary and sufficient conditions for

unconditional stability are given as K>1:

B1 = 1 + I S11 I2 – I S22 I2 – I ∆ I2 > 0

Figure 14. S–Parameter Test Circuit

IF

SMA 1.0n

Input

1 IN1

C2

2 DEC1

IN2 16

DEC2 15

1.0n 47

C15

3 VCC1

VEE1 14

VEE

1.0n

100n 10µ +

4 DETO1

RSSI

Buffer

13

5 DETO2

RSSI 12

1.0n

47

6 VCC2

VEE2 11

SMA

7 LIMO1

LIMO2 10

1.0n

8 QUAD1 QUAD2 9

IF

Output

Page 6 of 16

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