2001 Nov 27 11
Philips Semiconductors Product specification
UHF power LDMOS transistor BLF647
List of components class-AB 800 MHz test circuit (see Figs 11 and 12)
Notes
1. American Technical Ceramics type 100A or capacitor of same quality.
2. American Technical Ceramics type 180R or capacitor of same quality.
3. The striplines are on a double copper-clad printed-circuit board: Rogers 5880 (ε
r
= 2.2); thickness 0.79 mm.
COMPONENT DESCRIPTION VALUE DIMENSIONS
CATALOGUE
No.
C1, C2 multilayer ceramic chip capacitor; note 1 30 pF
C5 multilayer ceramic chip capacitor; note 1 10 pF
C6 tekelec trimmer 0.6 to 7.5 pF
C7, C8 multilayer ceramic chip capacitor; note 1 100 pF
C9 electrolytic capacitor 10 µF
C10, C11 multilayer ceramic chip capacitor; note 2 8.2 pF
C12, C13 multilayer ceramic chip capacitor; note 2 10 pF
C14 multilayer ceramic chip capacitor; note 2 4.7 pF
C15, C16 multilayer ceramic chip capacitor; note 2 100 pF
C17 multilayer ceramic chip capacitor; note 2 20 pF
C18 SMD capacitor 1 µF 2222 595 16754
C19 electrolytic capacitor 470 µF
C20 electrolytic capacitor 100 µF
L1, L2 semi rigid coax UT70-25 Z = 25 Ω±1.5 Ω 30.6 mm
L3, L4 stripline; note 3 15 × 10 mm
L5, L6 stripline; note 3 5.5 × 15 mm
L7, L8 stripline; note 3 10 × 10 mm
L9, L10 stripline; note 3 15 × 5mm
L11, L12 stripline; note 3 48.5 × 2.4 mm
L13 stripline; note 3 10 × 2.4 mm
L14 ferrite
L15, L16 Coilcraft SMD coil 1008CS-102XKBC 1 µH
B1 semi rigid coax (lambda/2) Z = 50 Ω±1.5 Ω lambda/2
B2 semi rigid coax balun UT70-25 Z = 25 Ω±1.5 Ω 48.5 mm
R1 resistor 1 kΩ
R2, R3 resistor 100 Ω
R4 resistor 3,3 Ω
