EL4095CS INTERSIL [Intersil Corporation], EL4095CS Datasheet - Page 16

• Manufacturer Part Number: EL4095CS
• Description: Video Gain Control/Fader/Multiplexer
• Manufacturer: INTERSIL [Intersil Corporation]

The EL4095 is connected as a unity-gain fader, with an LRC
peaking network connected to the A-input and an RC rolloff
network connected to the B-input. The plot shows the range
of peaking controlled by the V
be useful for flattening the frequency response of a system,
or for providing equalization ahead of a lossy transmission
line.
Noise
The electrical noise of the EL4095 has two components: the
voltage noise in series with +V
there is a current noise injected into -V
output noise will be
and the input-referred noise is
V
V
n, input referred
n, out
=
–
(
A
V
×
V
=
n, input
(
V
n, input
16
GAIN
)
IN
2
+
is 5nV√Hz wideband, and
(
I
input. This circuit would
n, input
)
2
+
IN
(
I
n, input
of 35pA√Hz. The
FIGURE 6. VARIABLE PEAKING FILTER
×
R
F
)
2
×
R
,
F
⁄
A
V
)
2
EL4095
where A
of input-referred noise vs A
FIGURE 7. INPUT-REFERRED NOISE VS
V
is the fed-back gain of the EL4095. Here is a plot
CLOSED-LOOP GAIN
V
: