UPC2776 NEC, UPC2776 Datasheet - Page 4

• Manufacturer Part Number: UPC2776
• Description: 5 V/ SUPER MINIMOLD SILICON MMIC MEDIUM OUTPUT POWER AMPLIFIER
• Manufacturer: NEC

TEST CIRCUIT
Components of test circuit for
measuring electrical characteristics
INDUCTOR FOR THE OUTPUT PIN
transistor, connect an inductor between the V
listed above.
voltage drop to output enable high level. In terms of AC, the inductor make output-port impedance higher to get
enough gain. In this case, large inductance and Q is suitable.
CAPACITORS FOR THE V
for the input and output pins.
can be supplied against V
impedance. Their capacitance are therefore selected as lower impedance against a 50
perform as high pass filters, suppressing low frequencies to DC.
10 MHz operation, increase the value of coupling capacitor such as 10 000 pF. Because the coupling capacitors are
determined by equation, C = 1/(2 Rfc).
4
C
The internal output transistor of this IC consumes 20 mA, to output medium power. To supply current for output
The inductor has both DC and AC effects. In terms of DC, the inductor biases the output transistor with minimum
Capacitors of 1 000 pF are recommendable as the bypass capacitor for the V
The bypass capacitor connected to the V
The coupling capacitors, connected to the input and output pins, are used to cut the DC and minimize RF serial
To obtain a flat gain from 100 MHz upwards, 1 000 pF capacitors are used in the test circuit. In the case of under
1
C
to C
L
3
2
Capacitor
Bias Tee
Bias Tee
TYPE
CC
IN
1 000 pF
1 000 nH
1 000 pF
fluctuation.
VALUE
CC
50
, INPUT, AND OUTPUT PINS
1 000 pF
C
1
CC
CC
1
pin is used to minimize ground impedance of V
pin (pin 6) and output pin (pin 4). Select large value inductance, as
1 000 pF
Example of actural application components
C
C
3
1
to C
L
6
V
CC
3
2, 3, 5
Chip capacitor
Chip inductor
4
TYPE
1 000 pF
L
C
2
1 000 pF
VALUE
100 nH
10 nH
50
CC
OUT
pin and the coupling capacitors
OPERATING FREQUENCY
load. The capacitors thus
100 MHz or higher
100 MHz or higher
CC
1.0 GHz or higher
pin. So, stable bias
PC2776TB