NJM2275F1 データシートの表示（PDF） - Japan Radio Corporation

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NJM2275F1

VHF/UHF BAND RF AMPLIFIER

Japan Radio Corporation  

NJM2275

EVALUATION PC BOARD

The evaluation board is useful for your design and to have more understanding of the usage and performance of

this device. This circuit is the same as TEST CIRCUIT. Note that this board is not prepared to show the

recommendation of pattern and parts layout.

Circuit Diagram

RF IN

C in L in

1000p 27n

RF IN

1

GND

2

Cb BIAS CAP

1000p

3

Evaluation PC Board

V+

V+

6

I REF Cref

1000p

5

Cv

1000p

RF OUT

4

CL RL

2p 0Ω

Lout Cout

15n 8p

RF OUT

V+

RFIN

Lout

Cv 1608

1608

Cout 1608

Cl Rl

1608

1608

Cin Lin

①

1608

1608

Cref

1608

Cb

1608

Pin1

RFOUT

This evaluation board is designed to have the maximum value of PG at 400MHz.

By using the value of Test Circuit2, this board can have the maximum value of VG at 400MHz.

Cref is effective to obtain good NF. However, if the ground has a large noisy signal, NF may become worse.

Ver.2005-06-01

-5-

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