cha2093rbf United Monolithic Semiconductors, cha2093rbf Datasheet - Page 4

• Manufacturer Part Number: cha2093rbf
• Description: 20-30ghz Noise Amplifier
• Manufacturer: United Monolithic Semiconductors

CHA2093RBF
Biasing Options
This chip inside the SMD type package is a two stage amplifier, and flexibility is provided by
the access to number of pads. The internal DC electrical schematic is given in order to use
these pads in a safe way.
The two requirements are :
N°1:
N°2:
We propose two standard biasing :
1)
2)
Ref. : DSCHA2093RBF2057 -26-Feb.-02-
Not exceed Vds = 3.5Volt ( internal Drain to Source voltage ).
Not biased in such a way that Vgs becomes positive.
Low Noise and low consumption :
Low Noise and high output power :
(A separate acces to the gate voltages of the first and the output stage is provided.
Nominal bias is obtained for a typical current of 30mA for the output stage and 15 mA
for the first stage. The first step to bias the amplifier is to tune the Vg1 =-1V and Vg2
to drive 30mA for the full amplifier. Then Vg1 is reduced to obtain 45 mA of current
through the amplifier.)
Route Départementale 128 , B.P.46 - 91401 ORSAY Cedex - FRANCE
Tel.: [phone] - Fax : [phone]
IN
Vg 1
Vds1
( internal Gate to Source voltage )
50
4/8
Vg 2
Vd
20-30GHz Low Noise Amplifier
Vd = 3.5V and Id = 30mA ( Vg1=Vg2)
Vd = 4.0V and Id = 45mA.
Specifications subject to change without notice
Vds2
25
OUT