CHA2192 Datasheet, PDF (4/6 Pages) United Monolithic Semiconductors – 24-26.5GHz Low Noise Amplifier

CHA2192
24-26.5GHz Low Noise Amplifier
Typical on Wafer Measurements
Bias conditions: Vd=3.5V, Id= 40mA
20,00
15,00
Gain
10,00
5,00
NF
0,00
-5,00
dBS11
-10,00
-15,00
dBS22
-20,00
10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40
Frequency ( GHz )
Typical Bias Tuning for Low Noise Operation
For low noise operation, a separate access to the gate voltages of the input stage ( Vgs1 ) and of the
output stage ( Vgs2 ) is provided.
Nominal bias for low noise operation is obtained for a typical current of 20 mA for the output stage and
10 mA for the input stage ( 30 mA for the amplifier ).
The first step to bias the amplifier is to tune the Vgs1 = -1V, and Vgs2 to drive 20 mA for the full
amplifier. Then Vgs1 is reduced to obtain 30 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. : DSCHA21928155
4/6
Specifications subject to change without notice
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