Single-Ended Gain Stages
3-9
THS6132EVM Applications
3.6
Single-Ended Gain Stages
Although ADSL is the obvious application for the THS6132 EVM, it can also
be configured for other applications. If the common gain resistor R8 is
removed, there is an array of components that allows various dc- and
ac-coupled gain stages to be constructed.
Referring to Figure 3-5, for example, two dc coupled gain stages are formed
by removing R9 and adding R4 and R14. The output impedance is changed
to 75
Ω
by changing R6 and R15 to 24.9
Ω
. There are many other possibilities.
Figure 3-5. Single-Ended Amplifier Configuration
14 (21)
3 (5)
15 (23)
2 (4)
12 (20)
J3
OUT2
R15
TP1
J1
OUT1
R6
U1B
THS6132
+
-
11 (18)
R7
R16
TP2
TP4
TP3
Z1
R9
J2
IN1
+
-
U1A
THS6132
Z2
R18
J4
IN2
0
0
R10
49.9
R5
1 k
R2
1 k
24.9
49.9
49.9
24.9
R11
1 k
R14
1 k
0
0
R19
49.9
Note:
Component pin numbers shown are for THS6132RGW while pin numbers in parentheses are for THS6132VFP.
