Figure 8, Typical Common Source Amplifier Gain vs Power Out

14

12

10

8

6

0

40

80

120

160

160

120

80

40

0

02

4

6

8

10

Figure 7, Typical Power Out vs Power In

Class C

V

DD

= 150V

f = 81.36 MHz

Class C

V

DD

= 150V

f = 81.36 MHz

Figure 5, Typical Threshold Voltage vs Temperature

Figure 6, Typical Output Characteristics

PRELIMINARY

1.2

1.1

1.0

0.9

0.8

0.7

-50

-25

0

25

50

75

100 125 150

25

20

15

10

5

0

1

5

10

15

20

25

30

ARF461A/B

5.5V

6V

4V

VGS=15, 10, 8 & 6.5V

1.0

10

RECTANGULAR PULSE DURATION (SECONDS)

Figure 9, Typical Maximum Effective Transient Thermal Impedance, Junction-To-Case vs Pulse Duration

0.6

0.1

0.05

0.01

0.005

0.001

Note:

Duty Factor D =

t1/t

2

Peak TJ = PDM x ZθJC + TC

t1

t2

0.1

SINGLE PULSE

0.02

0.05

0.2

0.01

4.5V

5V

D=0.5

Table 1 - Typical Class AB Large Signal Input - Output Impedance

Freq. (MHz)

Zin (Ω)

Z

2.0

13.5

27

40

65

20.4 - j 9.6

2.1 - j 6.4

.50 - j 2.3

.20 - j 0.4

.46 + j 2.0

148 - j 20

84 - j 74

36 - j 63

19 - j 48

7.7 - j 30

Zin - Gate shunted with 25Ω

Z

Conjugate of optimum load for 150 Watts output at Vdd = 250V