NJM2275 데이터 시트보기 (PDF) - Japan Radio Corporation

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NJM2275

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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

C in L in

1000p 27n

RFIN

1

V+

6

Cv

1000p

2

Cb

1000p

3

5

CL RL

2p 1kΩ

4

Lout Cout

27n 4p

RFOUT

Evaluation PC Board

RFIN

V+

Lout

CV 1608

1608

Cout 1608

CL

1608

1608

RL

1608

1608

Cin Lin

①

Cb

1608

Pin1

RFOUT

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

By using the value of Test Circuit1, this board can be changed to have the maximum value of PG at 400MHz.

If NF is not so good, Pin 5 may have a noisy signal. In such cases, it may be effective to connect a capacitor

between Pin 5 and ground. However, if the ground has a large noisy signal, NF may become worse.

-4-

Ver.2004-08-25

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