upc3244tb Renesas Electronics Corporation., upc3244tb Datasheet - Page 5

• Manufacturer Part Number: upc3244tb
• Description: Bipolar Analog Integrated Circuit 3.3 V, Silicon Germanium Mmic Medium Output Power Amplifier
• Manufacturer: Renesas Electronics Corporation.

μ
TEST CIRCUIT
INDUCTOR FOR THE OUTPUT PIN
The internal output transistor of this IC, to output medium power. To supply current for output transistor, connect an
inductor between the V
Select inductance, as the value listed above. The inductor has both DC and AC effects.
In terms of DC, the inductor biases the output transistor with minimum voltage drop to output enable high level. In
terms of AC, the inductor makes output-port impedance higher to get enough gain. In this case, large inductance and Q
is suitable (Refer to the following page).
CAPACITORS FOR THE V
Capacitors of 1 000 pF are recommendable as the bypass capacitor for the V
pF are recommendable for the input and output pins.
The bypass capacitor connected to the V
supplied against V
The coupling capacitors, connected to the input and output pins, are used to cut the DC and minimize RF serial
impedance. Their capacitances are therefore selected as lower impedance against a 50 Ω load. The capacitors thus
perform as high pass filters, suppressing low frequencies to DC.
R09DS0015EJ0100 Rev.1.00
Mar 28, 2011
COMPONENTS OF TEST CIRCUIT FOR MEASURING
ELECTRICAL CHARACTERISTICS
PC3244TB
C1, C2
L1
C3, C4, C5
C6
The application circuits and their parameters are for reference only and are not intended for use in actual design-ins.
IN
Chip Inductor
Chip Capacitor
Chip Capacitor
Feed-through Capacitor
CC
fluctuation.
Microstrip Line (50 Ω)
CC
100 pF
C1
pin (pin 3) and output pin (pin 1).
Type
C5
1 000 pF
CC
C4
1 000 pF
CC
, INPUT AND OUTPUT PINS
pin is used to minimize ground impedance of V
4
1 000 pF
1 000 pF
100 pF
Value
68 nH
1
2, 5, 6
V
GND
CC
3
C6
1 000 pF
Microstrip Line (50 Ω)
68 nH
L1
CC
pin. And the coupling capacitors of 100
C2
100 pF
C3
1 000 pF
CC
Z
pin. So, stable bias can be
OUT
S
= Z
L
= 50 Ω
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