BLF278 データシートの表示（PDF） - Philips Electronics
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BLF278 Datasheet PDF : 21 Pages
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Philips Semiconductors
VHF push-pull power MOS transistor
Product Specification
BLF278
handbook, full pagewidth
130
strap
strap
strap
strap
150
strap
strap
strap
100
strap
50 Ω
input
C1 C3
R1
C2 C4
V DD1
T1
L1
C5
L2
IC1
C35
R11
C36
C11
C8
slider R2
R2 and R7
C9
C12
C13
R3
R4
L3
C6
L4
C7 L5 L7
L6 L8
C15
slider R7
R5
R6
C10
C14
C20
C22
L11
R8
C16
C21
C17
L11
V DD1
L12
L9
L13
C26
L10 L14
L17
C27
L18
C28
L15
V DD2
C18
L16
R9
C23 L16 C19 C24
C25
L22
50 Ω
output
L21
C31 C33
L19
C29
L20
C30
C32
C34
L23
R10
MBC438
Dimensions in mm.
The circuit and components are situated on one side of the PTFE fibre-glass board, the other side being fully metallized to serve as an earth.
Earth connections are made by means of copper straps for a direct contact between upper and lower sheets.
Fig.13 Printed-circuit board and component layout for 108 MHz class-B test circuit.
1996 Oct 21
11
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