cha3093c United Monolithic Semiconductors, cha3093c Datasheet - Page 8

• Manufacturer Part Number: cha3093c
• Description: 20-40ghz Medium Power Amplifier
• Manufacturer: United Monolithic Semiconductors

Typical Bias Tuning
The circuit schematic is given below :
For medium power operation, the four 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 300mA. A separate access to the gate voltages of the two first stages ( Vg1,2 )
is provided in order to be able to tune the first stages for the application, as a lower noise amplifier or
a multiplier.
An additional pad is provided for monitoring the output power, using the Build In Test. This access,
when connected to an external resistor of 10 kOhm ( typical value ) provides a DC voltage which
follows the output power level.
Ref. : DSCHA30932158 -07-June-02
20-40GHz Medium Power Amplifier
IN
On wafer power measurements versus output power
Route Départementale 128 - B.P.46 - 91401 Orsay Cedex France
Tel. : [phone] - Fax : [phone]
Vd1
Vg1
United Monolithic Semiconductors S.A.S.
Vg 2
8/10
Vg 3,4
Vd 2,3,4
Vd 2,3,4
Specifications subject to change without notice
Vdet
OUT
CHA3093c