CHA2097A Ver la hoja de datos (PDF) - United Monolithic Semiconductors
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Fabricante
CHA2097A Datasheet PDF : 8 Pages
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20-40GHz Variable Gain Amplifier
Typical Bias Tuning
The circuit schematic is given below :
Vd1
Vd 2,3
IN
CHA2097a
OUT
Attenuator
Vctrl
Vg1
Vg 2
Vg 3
For gain control operation, The three drain biases are connected altogether. In a same way, all the
gate biases are connected together at the same power supply, tuned to drive a small signal operating
current of 140mA. A separate access to the gate voltages of each stages ( Vg1,2,3 ) is provided for
fine tuning of the stages regarding the application.
An additional pad is provided ( Vctrl ) to control the gain of the circuit, driving two cold transistors in
attenuator arrangement.
Ref. : DSCHA20978021
7/8
Specifications subject to change without notice
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