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 (εr= 4.5),
thickness 1⁄16 inch.
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 Ω15 ×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 MΩ
R3 0.4 W metal film resistor 10 Ω