2N5484 2N5486

4–118

Motorola Small–Signal Transistors, FETs and Diodes Device Data

2.0

VDS, DRAIN–SOURCE VOLTAGE (VOLTS)

Figure 2. 100 MHz and 400 MHz Neutralized Test Circuit

0

10

2.0

4.0

6.0

8.0

0

4.0

6.0

8.0

10

12

14

ID = 5.0 mA

100 MHz

VDS = 15 Vdc

f1 = 399 MHz

f2 = 400 MHz

2.0

ID, DRAIN CURRENT (mA)

1.5

6.5

2.5

3.5

4.5

5.5

0

4.0

6.0

8.0

10

12

14

Figure 3. Effects of Drain–Source Voltage

Figure 4. Effects of Drain Current

NOISE FIGURE

(Tchannel = 25°C)

*L1

17 turns, (approx. — depends upon circuit layout) AWG #28

enameled copper wire, close wound on 9/32

″ ceramic coil

form. Tuning provided by a powdered iron slug.

*L2

4–1/2 turns, AWG #18 enameled copper wire, 5/16

″ long,

3/8

″ I.D. (AIR CORE).

*L3

3–1/2 turns, AWG #18 enameled copper wire, 1/4

″ long,

3/8

″ I.D. (AIR CORE).

**L1

6 turns, (approx. — depends upon circuit layout) AWG #24

enameled copper wire, close wound on 7/32

″ ceramic coil

form. Tuning provided by an aluminum slug.

**L2

1 turn, AWG #16 enameled copper wire, 3/8

″ I.D.

(AIR CORE).

**L3

1/2 turn, AWG #16 enameled copper wire, 1/4

″ I.D.

(AIR CORE).

Adjust VGS for

ID = 50 mA

VGS < 0 Volts

NOTE:

The noise source is a hot–cold body

(AIL type 70 or equivalent) with a

test receiver (AIL type 136 or equivalent).

Reference

Designation

VALUE

100 MHz

400 MHz

C1

7.0 pF

1.8 pF

C2

1000 pF

17 pF

C3

3.0 pF

1.0 pF

C4

1–12 pF

0.8–8.0 pF

C5

1–12 pF

0.8–8.0 pF

C6

0.0015

µF

0.001

µF

C7

0.0015

µF

0.001

µF

L1

3.0

µH*

0.2

µH**

L2

0.15

µH*

0.03

µH**

L3

0.14

µH*

0.022

µH**

INPUT

TO 50

Ω

SOURCE

NEUTRALIZING

COIL

L1

C5

L3

Rg′

C1

C6

C4

L2

C3

TO 500

Ω

LOAD

CASE

C7

COMMON

ID = 5.0 mA

VGS

VDS

+15 V

C2

Pin, INPUT POWER PER TONE (dB)

+40

Figure 5. Third Order Intermodulation Distortion

16

18

20

f = 400 MHz

f = 400 MHz

100 MHz

VDS = 15 V

VGS = 0 V

+20

0

–20

–40

–60

–80

– 100

– 120

– 140

– 160

– 120

– 100

– 80

– 60

– 40

– 20

0

+ 20

3RD ORDER INTERCEPT

FUNDAMENTAL

OUTPUT @ IDSS,

0.25 IDSS

3RD ORDER IMD

OUTPUT @ IDSS,

0.25 IDSS

INTERMODULATION CHARACTERISTICS