CHA2193-99F View Datasheet(PDF) - United Monolithic Semiconductors
Part Name
Description
MFG CO.
'CHA2193-99F' PDF : 10 Pages View PDF
20-30GHz Low Noise Amplifier
CHA2193
20
18
16
Gain
14
(dB)
12
10
8
6
4
2
0
Pout
-2
(dBm)
-4
-6
-8
-10
-28 -26 -24 -22 -20 -18 -16 -14 -12 -10 -8
-6
Input power (dBm)
Typical Bias Tuning for Low Noise Operation
For low noise operation, a separate access to the gate voltages of the first stage ( Vgs1 ), and of the
second and third stages ( Vgs2 ) is provided.
Nominal bias for low noise operation is obtained for a typical current of 20 mA for the second and third
stages and 10 mA for the first stage ( 50 mA for the amplifier ).
The first step to bias the amplifier is to tune the Vgs1 = -1V, and Vgs2 to drive 40 mA for the full
amplifier. Then Vgs1 is reduced to obtain 50 mA of current through the amplifier.
A fine tuning of the noise figure may be obtained by modifying the Vgs1 bias voltage, but keeping the
previous value for Vgs2.
Ref. : DSCHA21939042-11 Feb 99
7/10
Specifications subject to change without notice
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE
Tel.: +33 (0)1 69 33 03 08 - Fax : +33 (0)1 69 33 03 09
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