BLW81 查看數據表（PDF） - Philips Electronics
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BLW81 Datasheet PDF : 11 Pages
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Philips Semiconductors
UHF power transistor
Product specification
BLW81
APPLICATION INFORMATION
R.F. performance in c.w. operation (unneutralized common-emitter class-B circuit); Th = 25 °C
f (MHz)
470
470
175
VCE (V)
12,5
13,5
12,5
PL (W)
10
10
10
PS (W)
< 2,5
typ 1,9
typ 0,45
GP (dB)
> 6,0
typ 7,2
typ 13,5
IC (A)
< 1,33
−
−
η (%)
> 60
typ 75
typ 60
zi (Ω)
1,3 + j2,5
−
1,2 − j0,6
YL (mS)
150 − j66
−
140 − j80
handbook, full pagewidth
50 Ω
C1
C2
L1
C3 C4
C5
T.U.T.
L2 C6
R1
L5
L3
C10
C9
C7
C8 R2
50 Ω
L4
+VCC
MGP578
Fig.7 Class-B test circuit at f = 470 MHz.
List of components:
C1 = 2,2 pF (± 0, 25 pF) ceramic capacitor
C2 = C9 = C10 = 2 to 18 pF film dielectric trimmer (cat. no. 2222 809 09003)
C3 = 3,9 pF (± 0,25 pF) ceramic capacitor
C4 = 1,4 to 5,5 pF film dielectric trimmer (cat. no. 2222 809 09001)
C5 = C6 = 15 pF ceramic chip capacitor (cat. no. 2222 851 13159)
C7 = 100 pF ceramic feed-through capacitor
C8 = 100 nF polyester capacitor
L1 = stripline (27,9 mm × 6,0 mm)
L2 = 13 turns closely wound enamelled Cu wire (0,5 mm); int. dia. = 4 mm; leads 2 × 5 mm
L3 = 17 nH; 11⁄2 turns enamelled Cu wire (1 mm); spacing 1 mm; int. dia. = 6 mm; leads 2 × 5 mm
L4 = Ferroxcube wide-band h.f. choke, grade 3B (cat. no. 4312 020 36640)
L5 = stripline (45,8 mm × 6,0 mm)
L1 and L5 are striplines on a double Cu-clad printed circuit board with PTFE fibre-glass dielectric
(εr = 2,74); thickness 1/16".
R1 = 1 Ω (± 5%) carbon resistor
R2 = 10 Ω (± 5%) carbon resistor
Component layout and printed-circuit board for 470 MHz test circuit (Fig.8).
March 1993
6
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