September 1992

8

Philips Semiconductors

Product specification

VHF power MOS transistor

BLF244

List of components (class-B test circuit)

Notes

1. American Technical Ceramics (ATC) capacitor, type 100B or other capacitor of the same quality.

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

3. Refer to Application Information for value.

COMPONENT

DESCRIPTION

VALUE

DIMENSIONS

CATALOGUE NO.

C1, C12

multilayer ceramic chip capacitor

(note 1)

680 nF

C2

multilayer ceramic chip capacitor

(note 1)

20 pF

C3, C4, C9

film dielectric trimmer

5 to 60 pF

2222 809 08003

C5

multilayer ceramic chip capacitor

(note 1)

75 pF

C6

multilayer ceramic chip capacitor

10 nF

2222 852 47103

C7

multilayer ceramic chip capacitor

(note 1)

100 pF

C8

multilayer ceramic chip capacitor

(note 1)

47 pF

C10, C11

multilayer ceramic chip capacitor

(note 1)

11 pF

C13

solid tantalum capacitor

2.2

µF

C14

multilayer ceramic chip capacitor

100 nF

2222 852 47104

L1

4 turns enamelled 1 mm copper wire 32 nH

length 6.3 mm

int. dia. 3 mm

leads 2

× 5mm

L2

1 turn enamelled 1 mm copper wire

12.2 nH

int. dia. 5.6 mm

leads 2

× 5mm

L3, L4

stripline (note 2)

30

Ω

15

× 6 mm

L5

6 turns enamelled 1 mm copper wire 119 nH

length 10.4 mm

int. dia. 6 mm

leads 2

× 5mm

L6

grade 3B Ferroxcube RF choke

4312 020 36640

L7

2 turns enamelled 1 mm copper wire 19 nH

length 2.4 mm

int. dia. 3 mm

leads 2

× 5mm

L8

4 turns enamelled 1 mm copper wire 28.5 nH

length 8.5 mm

int. dia. 3 mm

leads 2

× 5mm

R1

metal film resistor (note 3)

R2

0.4 W metal film resistor

1 M

Ω

R3

0.4 W metal film resistor

10

Ω