VRF151

+ 50VDC

+

C8

C4

C6

C7

L2

C3

R2

R1

C5

L1

C2

C1

Bias

0-12V

C9

C10

RF

Input

RF

Output

C1 -- 470 pF Dipped Mica

C2, C5, C6 - C9 -- 0.1uF SMT

C3 -- 200pF ATC 700C

C4 -- 15pF, ATC 700C

C10 -- 10uF, 100V Electrolytic

L1 - VK200-4B

L2 -- 2 Ferrite beads, 2.0 uH

R1, R2 -- 51 , 1 W Carbon

R3 -- 3.3 , 1 W Carbon

T1 -- 9:1 Transformer

T2 -- 1:9 Transformer

DUT

T2

R3

60

55

50

45

40

35

30

25

20

0

50

100

150

200

0

0.1

0.2

0.3

0.4

0.5

0.6

0.7

10

1.0

0.5

SINGLE PULSE

0.1

0.3

0.7

0.05

Peak TJ = PDM x ZθJC + TC

Duty Factor D =

2

t2

t1

Note:

RECTANGULAR PULSE DURATION (seconds)

Figure 5. Maximum Effective Transient Thermal Impedance Junction-to-Case vs Pulse Duration

0

50

100

150

200

250

0

5

10

15

20

25

30

P

Figure 6. IMD versus P

OUT

P

Figure 7. P

Typical Performance Curves

30 MHz test Circuit

Vdd=50V, Idq = 250mA,

Freq=150MHz

Vdd=50V, Idq = 250mA,

Freq=150MHz

IM3

IM5

Vdd=40V

Vdd=50V

0.9