1998 Jan 21

11

Philips Semiconductors

Product specification

UHF power MOS transistor

BLF544

List of components (see Figs 12 and 13)

Notes

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

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

3. The striplines are on a double copper-clad printed-circuit board with glass microfibre reinforced PTFE (

COMPONENT

DESCRIPTION

VALUE

DIMENSIONS

CATALOGUE NO.

C1

multilayer ceramic chip capacitor;

note 1

68 pF; 500 V

C2

multilayer ceramic chip capacitor;

note 2

1.6 pF; 50 V

C3, C5, C16, C18 film dielectric trimmer

1.4 to 5.5 pF

2222 809 09001

C4

multilayer ceramic chip capacitor;

note 2

1 pF; 50 V

C6

multilayer ceramic chip capacitor

10 nF; 50 V

2222 852 47103

C7, C11

multilayer ceramic chip capacitor;

note 1

56

µF; 500 V

C8, C9, C15, C17 multilayer ceramic chip capacitor

note 2

6.8

µF; 50 V

C10

multilayer ceramic chip capacitor

100 nF; 50 V

2222 852 47104

C12

electrolytic capacitor

4.7

µF; 63 V

2222 030 38478

C13

multilayer ceramic chip capacitor;

note 2

16 pF; 50 V

C14

multilayer ceramic chip capacitor;

note 2

18 pF; 50 V

C19

multilayer ceramic chip capacitor;

note 1

62 pF; 500 V

L1, L8

stripline; note 3

50

Ω

6

× 2.5 mm

L2

stripline; note 3

50

Ω

38

× 2.5 mm

L3

stripline; note 3

50

Ω

17.5

× 2.5 mm

L4, L5

stripline; note 3

42

Ω

3

× 3mm

L6

2 turns enamelled 1 mm copper

wire

16 nH

length 3.4 mm

int. dia. 3 mm

leads 2

× 5mm

L7

grade 3B Ferroxcube RF choke

4312 020 36642

L9

stripline; note 3

50

Ω

21

× 2.5 mm

L10

stripline; note 3

50

Ω

34.5

× 2.5 mm

R1

0.4 W metal film resistor

15 k

Ω

2322 151 11473

R2

10 turns potentiometer

50 k

Ω

R3

0.4 W metal film resistor

140 k

Ω

2322 151 11404

R4

0.4 W metal film resistor

10

Ω

2322 153 51009