RMPA29200 데이터 시트보기 (PDF) - Fairchild Semiconductor

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RMPA29200

29–31 GHZ 2 Watt Power Amplifier MMIC

Fairchild Semiconductor 

Recommended Procedure for Biasing and Operation

CAUTION: LOSS OF GATE VOLTAGE (Vg) WHILE

DRAIN VOLTAGE (Vd) IS PRESENT MAY DAMAGE THE

AMPLIFIER CHIP.

The following sequence of steps must be followed to

properly test the amplifier.

Step 1: Turn off RF input power.

Step 2: Connect the DC supply grounds to the ground of

the chip carrier. Slowly apply negative gate bias supply

voltage of -1.5V to Vg.

Step 3: Slowly apply positive drain bias supply voltage of

+5V to Vd.

Step 4: Adjust gate bias voltage to set the quiescent

current of Idq = 1500mA.

Step 5: After the bias condition is established, the RF input

signal may now be applied at the appropriate frequency

band.

Step 6: Follow turn-off sequence of:

(i) Turn off RF input power,

(ii) Turn down and off drain voltage (Vd),

(iii) Turn down and off gate bias voltage (Vg).

©2004 Fairchild Semiconductor Corporation

RMPA29200 Rev. D

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