2.1-2.5 GHz InGaP HBT
Matched Gain Block Amplifier
February 2008 - Rev 03-Feb-08
CGB7389-SC
Application Circuit - Passive Bias,V Supply = 8V
Note: This schematic represents the topology of the application circuit recommended by Mimix.
Recommended Bias Resistor Values for ID = 120 mA
Supply Voltage (V)
Rbias (R1 Description: 1206 1/4W 1%) 18
Rbias (R1 Description: 1210 1/2W 1%)
7V
8V
27
9V 10V 12V
—
—
43
—
62
—
—
36
Note: Rbias provides DC bias stability over temperature.
Application Schematic
R2
R1
Vs
C3
C4
C5
L2
L1
R3
4
2
TL 1
RF OUT
TL2
RF IN
1
3
C2
C1
C6
Output
Match
C7 Input
Match
Ref
2140 MHz 2450 MHz
Description /
Size
PHYC 0805 NPO
0805 X7R
Passive Bias Evaluation Board Layout
Designator Value
Value
1000 pf
DNP
C1, C2
C3
1000 pf
DNP
—
C4
DNP
DNP
—
C5
1
F
1 F
PHYC 0805 NPO 10%
PHYC 0805 NPO 10%
Coilcraft 0603 10%
Coilcraft 0603 10%
KOA 2010 5% 3/4W
KOA 0805 1% 1/8W
KOA 0805 1% 1/8W
C6
C7
L1
L2
R1
R2
R3
1.0 pF
1.0 pF
22 nH
22 nH
27
1.0 pF
1.0 pF
22 nH
22 nH
27
391
182
391
182
EL1
EL2
9 deg
21 deg
10 deg
45 deg
Page 14 of 15
Mimix Broadband, Inc., 10795 Rockley Rd., Houston,Texas 77099
Tel: 281.988.4600 Fax: 281.988.4615 mimixbroadband.com
Characteristic Data and Specifications are subject to change without notice. ©2008 Mimix Broadband, Inc.
Export of this item may require appropriate export licensing from the U.S. Government. In purchasing these parts, U.S. Domestic customers accept
their obligation to be compliant with U.S. Export Laws.
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