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GHz TECHNOLOGY INC. RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE. GHz RECOMMENDS THAT

BEFORE THE PRODUCT(S) DESCRIBED HEREIN ARE WRITTEN INTO SPECIFICATIONS, OR USED IN CRITICAL APPLICATIONS,

THAT THE PERFORMANCE CHARACTERISTICS BE VERIFIED BY CONTACTING THE FACTORY.

GHz Technology Inc. 3000 Oakmead Village Drive, Santa Clara, CA 95051-0808 Tel. 408 / 986-8031 Fax 408 / 986-8120

0204-125

125 Watts, 28 Volts, Class AB

 Defcom  225 - 400

 MHz

GENERAL DESCRIPTION

The 0204-125 is a double input matched COMMON EMITTER broadband

transistor specifically intended for use in the 225-400 MHz frequency band.  It

may be operated in Class AB or C.  Gold metallization and silicon diffused

resistors ensure ruggedness and high reliability.  

CASE OUTLINE

55JT- Style 2

ABSOLUTE MAXIMUM RATINGS

Maximum Power Dissipation @ 25 C                     270 Watts

o

Maximum Voltage and Current

BVces     Collector to Emiter Voltage                         65 Volts

BVebo     Emitter to Base Voltage                             4.0 Volts

Ic             Collector Current                                            16.0 A

Maximum Temperatures

Storage Temperature                                         - 65 to +150 C

o

Operating Junction Temperature                                  +200 C                         

o

ELECTRICAL CHARACTERISTICS  @ 25  C

O

SYMBOL

CHARACTERISTICS

TEST CONDITIONS

MIN

TYP

MAX

UNITS

Pout 

Pin

Pg

η

VSWR

Power Output 

Power Input

Power Gain

Efficiency 

Load Mismatch Tolerance 

F  =  400 MHz

Vcc =  28 Volts

 

125

7.0

8.5

60

25

5:1

Watts

Watts

dB

%

BVebo

2

BVces

2

BVceo

2

Cob  

2

h

FE

2

θ

jc 

Emitter to Base Breakdown 

Collector to Emitter Breakdown

Collector to Emitter Breakdown 

Output Capacitance 

DC - Current Gain

Thermal Resistance

Ie  =  10 mA

Ic  =  100 mA

Ie  =  100 mA

Vcb = 28 V, F = 1 MHz

Vce = 5 V, Ic = 1 A

4.0

60

32

20

70

100

0.65

Volts

Volts

Volts

pF

C/W

o

Note 2:  Per side 

Issue August 1996

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0204-125

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0204-125

CAPACITORS

C1,C2=39pF ceramic chip capacitor

C3=33pF ceramic chip capacitor

C4=56pF ceramic chip capacitor

C5=18pF ceramic chip capacitor

C6,C7,C8=27pF ceramic chip capacitor

C9=0.1mF ceramic capacitor

C10=10mF electrolytic capacitor

C11,C12=.5-10pF Johanson

INDUCTORS

L1,L2,L3,L4,L5,L6,L7,L8=printed

on the circuit board

L9,L12=4.7mH RF choke

L10,L11,L13,L14=0.1mH RF choke

RESISTORS

R1,R2=10 OHM, 1/4 W

TRANSISTOR

Q1=0204-125

RF INPUT

Zo=50W

C11

L2

L1

C1

C2

C3

C4

L4

L3

R2

L12

Q1

R1

L9

L14

L13

C9

C10

L6

L5

+

C6

C7

L8

L7

Zo=50W

C8

C12

RF

OUT

C5

August 1996