1995 Oct 27

6

Philips Semiconductors

Product specification

Silicon planar epitaxial

overlay transistors

2N3866; 2N4427

Ruggedness

The transistors are capable of withstanding a load mismatch corresponding to VSWR = 3 : 1 varied through all phases,

under the conditions mentioned in Table 1.

Fig.4 Test circuit for the 2N3866 at 400 MHz.

handbook, full pagewidth

C2

input

50

Ω

output

50

Ω

L1

C1

C7

C6

C5

R2

R1

C3

C4

MGC941

L2

L3

L5

L4

DUT

VEE

List of components (see Fig.4)

COMPONENT

DESCRIPTION

VALUE

DIMENSIONS

CATALOGUE No.

C1, C2, C3

air trimmer capacitor

4 to 29 pF

C4

air trimmer capacitor

4 to 14 pF

C5

feed-through

capacitor

1nF

C6

capacitor

12 pF

C7

capacitor

12 nF

R1

resistor

5.6

Ω

R2

resistor

10

Ω

L1

2 turns 1.0 mm

copper wire

−

int. diameter 6 mm;

winding pitch 3 mm

L2

Ferroxcube choke coil Z = 450

Ω;

f = 250 MHz

4312 020 36690

L3, L4

6 turns enamelled

0.5 mm copper wire

100 nH

int. diameter 3.5 mm

L5

2 turns 1.0 mm

copper wire

−

int. diameter 7 mm;

winding pitch

2.5 mm; leads

2

× 15 mm