BF244A 查看數據表（PDF） - Fairchild Semiconductor

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BF244A

N-Channel RF Amplifier

Fairchild Semiconductor 

Typical Characteristics (continued)

Capacitance vs Voltage

10

f = 0.1 - 1.0 MHz

5

C is ( V DS = 15 V)

1

C rs ( V DS = 0 V)

0

-5

-10

-15

-20

VGS-- GATE-SOURCE VOLTAGE(V)

Common Gate Characteristics

Output Admittance

1

b OgS (x 10)

g

Ogs

V DS = 15V

V GS = 0

(CG)

100

200

300

500 700 1000

f -- FREQUENCY (MHz)

Forward Transadmittance

10

5

+g

fgs

-b fgs

1

V DS = 15V

V GS = 0

(CG)

100

200

300

500 700 1000

f -- FREQUENCY (MHz )

N-Channel RF Amplifier

(continued)

Noise Figure Frequency

5

V DS = 15V

4 I D = 5.0 mA

R g = 1.0 k Ω

T = +25 O C

A

3

2

1

0

10

20 30 50 100 200 300 500 1000

f -- FREQUENCY (MHz)

Input Admittance

V DS = 15V

V GS = 0

(CG)

10

5

1

100

g igs

b igs

5

200

300

500 700 1000

f -- FREQUENCY (MHz)

Reverse Transadmittance

1

V DS = 15V

V GS = 0

(CG)

g

rgs

- b rgs

100

200

300

500 700 1000

f -- FREQUENCY (MHz)

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