1999 Jul 23

8

Philips Semiconductors

Product specification

UHF wideband transistor

PRF947

handbook, full pagewidth

MGS507

0

0.2

0.6

0.4

0.8

1.0

1.0

+5

+2

+1

+0.5

−0.5

−1

−2

−5

0.2

1

2

5

180

°

−135

°

−90

°

−45

°

0

°

45

°

90

°

135

°

(2)

(3)

(4)

(5)

(6)

(7)

unstable

region load

unstable region

source

(1)

Γopt

0

+0.2

0.5

−0.2

handbook, full pagewidth

MGS506

0

0.2

0.6

0.4

0.8

1.0

1.0

+5

+2

+1

−0.2

−0.5

−1

−2

−5

0.5

1

2

5

180

°

−135

°

−90

°

−45

°

0

°

45

°

90

°

unstable

region load

unstable region

source

(2)

(3)

(4)

(5)

Γopt

(6)

(1)

0

+0.2

+0.5

135

°

(1) G = 17 dB

(2) G = 16 dB

(3) G = 15 dB

(4) NF = 1.6 dB

(5) NF = 1.8 dB

(6) NF = 2 dB.

Fig.12 Common emitter available gain, noise and stability circles; typical values.

Fig.13 Common emitter available gain, noise and stability circles; typical values.

(2) G = 10 dB

(3) G=9dB

(4) G=8dB

(5) NF = 2.1 dB

(6) NF = 2.3 dB

(7) NF = 2.5 dB.