MRF247

2

MOTOROLA RF DEVICE DATA

Characteristic

Symbol

Min

Typ

Max

Unit

ON CHARACTERISTICS

DC Current Gain

(IC = 5.0 Adc, VCE = 5.0 Vdc)

hFE

10

75

150

—

DYNAMIC CHARACTERISTICS

Output Capacitance

(VCB = 15 Vdc, IE = 0, f = 1.0 MHz)

Cob

—

235

300

pF

FUNCTIONAL TESTS

Common–Emitter Amplifier Power Gain

(VCC = 12.5 Vdc, Pout = 75 Watts, f = 175 MHz)

GPE

7.0

8.5

—

dB

Collector Efficiency

(VCC = 12.5 Vdc, Pout = 75 Watts, f = 175 MHz)

η

55

60

—

%

Load Mismatch

(VCC = 12.5 Vdc, Pout = 75 Watts, f = 175 MHz,

VSWR = 30:1 All Phase Angles)

ψ

No Degradation in Output Power

4

VCC = 12.5 V

Pout = 75 W

VCC = 12.5 V

100

80

60

40

6

8

10

12

14

16

18

20

22

24

Pin, INPUT POWER (WATTS)

130

14

10

6

2

140

150

160

170

180

f, FREQUENCY (MHz)

16

12

8

4

0

150 MHz

f = 136 MHz

175 MHz

Figure 1. Output Power versus Input Power

Figure 2. Output Power versus Input Power

Figure 3. Power Gain versus Frequency

C1, C17

330 pF ATC 100 mil Ceramic Capacitor

C2, C14

Johansen 1–20 pF Trimmer Capacitor

C3

40 pF Standard Unelco Clamped Mica Capacitor

C4, C16

Sprague 10

µF – 35 Vdc Electrolytic Capacitor

C5

80 pF Standard Unelco Clamped Mica Capacitor

C6, C13

91 pF Mini–Unelco Clamped Mica Capacitor

C7, C8

240 pF ATC 100 mil Ceramic Capacitor

C9, C10

180 pF ATC 100 mil Ceramic Capacitor

C11

150 pF Standard Unelco Clamped Mica Capacitor

C12

33 pF Mini–Unelco Clamped Mica Capacitor

C15

27 pF Mini–Unelco Clamped Mica Capacitor

L1

2 Turns, 16 AWG Enameled, IDIA 0.13

″

L2, L4

4 Turns, 18 AWG Enameled, IDIA 0.18

″

L3, L6

VK 200 with Ferrite Bead

L5

2 Turns, 16 AWG Enameled, IDIA 0.15

″

L3

L6

NC

C4

C6

C13

C16

C3

C8

C10

C12

C15

L2

L4

C1

L1

L5

C17

C7

C9

C2

C5

C11

C14

D.U.T.

+

+

12.5 V

+

–