cha2097a United Monolithic Semiconductors, cha2097a Datasheet - Page 7

• Manufacturer Part Number: cha2097a
• Description: 20-40ghz Variable Gain Amplifier
• Manufacturer: United Monolithic Semiconductors

20-40GHz Variable Gain Amplifier
CHA2097a
Typical Bias Tuning
The circuit schematic is given below :
V d 1
Vd 2,3
IN
O U T
Attenuator
Vg1
Vg 3
Vg 2
Vctrl
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
Specifications subject to change without notice
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