1998 Jan 29

8

Philips Semiconductors

Product specification

UHF power MOS transistor

BLF404

List of components used in test circuit (see Figs 10 and 11).

Notes

1. American Technical Ceramics type 100A or capacitor of same quality.

2. The striplines are on a double copper-clad printed circuit board, with DUROID dielectric (

thickness 0.79 mm, thickness of the copper sheet 2 x 35

µm.

COMPONENT

DESCRIPTION

VALUE

DIMENSIONS

CATALOGUE No.

C1

electrolytic capacitor

4.7

µF, 10 V

C2, C3

multilayer ceramic chip capacitor

47 nF

C4

multilayer ceramic chip capacitor; note 1

18 pF

C5, C10

multilayer ceramic chip capacitor; note 1

180 pF

C6, C11

multilayer ceramic chip capacitor; note 1

270 pF

C7

multilayer ceramic chip capacitor; note 1

22 pF

C8

multilayer ceramic chip capacitor; note 1

8.2 pF

C9

multilayer ceramic chip capacitor; note 1

2.7 pF

C12

multilayer ceramic chip capacitor; note 1

1.2 pF

C13

multilayer ceramic chip capacitor; note 1

12 pF

L1

2 turns 1 mm enamelled copper wire

on a grade 4B1 Ferroxcube core

ext. dia. = 4.2 mm

int. dia.=2mm

length = 6 mm

L2

3 turns 1 mm enamelled copper wire

int. dia. = 4.6 mm

leads = 2x5mm

L3

bifilar coil

lead dia. = 0.8 mm

L4

bifilar coil

lead dia. = 1 mm

L5

stripline; note 2

50

Ω

8.8

× 2.38 mm

L6

stripline; note 2

50

Ω

5.8

× 2.38 mm

L7

stripline; note 2

50

Ω

6.8

× 2.38 mm

L8

stripline; note 2

50

Ω

3.76

× 2.38 mm

L9

stripline; note 2

50

Ω

5.8

× 2.38 mm

L10

stripline; note 2

50

Ω

4.48

× 2.38 mm

L11

stripline; note 2

50

Ω

3.13

× 2.38 mm

R1, R2

SMD resistor

3.9 k

Ω

R3

metal film resistor

1 k

Ω, 0.25 W

R4

metal film resistor

22

Ω, 0.25 W

R5

metal film resistor

10 k

Ω, 0.25 W

R6

potentiometer

10 k

Ω