www.fairchildsemi.com
KH104
DC to 1.1GHz Linear Amplifier
Features
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General Description
The KH104 linear amplifier represents a significant
advance in linear amplifiers. Proprietary design
techniques have yielded an amplifier with 14dB of
gain and a -3dB bandwidth of DC to 1100MHz. Gain
flatness to 750MHz of 鹵0.4dB coupled with excellent
VSWR and phase linearity gives outstanding pulse
fidelity and low signal distortion.
Designed for 50鈩?systems, the KH104 is very easy to
use, requiring only properly bypassed power supplies
for operation. This translates to time and cost savings
in all stages of design and production.
Fast rise time, low overshoot and linear phase make
the KH104 ideal for high speed pulse amplification.
These properties plus low distortion combine to
produce an amplifier well suited to many communi-
cations applications. With a 1.1GHz bandwidth, the
KH104 can handle the fastest digital traffic, even
when the demodulation scheme or the digital coding
format requires that DC be maintained. It is also
ideal for traditional video amplifier applications such
as radar or wideband analog communications systems.
These same characteristics make the KH104 an excellent
choice for use in fiber optics systems, on either the
transmitting or receiving end of the fiber. The low
group delay distortion insures that pulse integrity
will be maintained. As a photomultiplier tube pre-
amp, its fast response and quick overload recovery
provide for superior system performance.
The KH104 is constructed using thin film resistor/
bipolar transistor technology, and is available in the
following versions:
KH104AI
14 +V
R
-3dB bandwidth of 1.1GHz
325psec rise and fall times
14dB gain, 50鈩?input and output
Low distortion, linear phase
1.4:1 VSWR (output, DC-1.1GHz)
Direct replacement for CLC104
Applications
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Digital and wideband analog communications
Radar, IF and RF processors
Fiber optic drivers and receivers
Photomultiplier preamplifiers
Basic Circuit Diagram
+15V
39
0.01
+15V
2.2
10K
Offset
Adjust
-15V
V
in
0.01
0.01
12
4
3,5-10
14
1
KH104
2
13
11
V
o
0.01
2.2
Capacitance if
碌F
39
0.01
-15V
Equivalent Circuit Diagram
+V
CC
1
+5.4V
Reg
Offset
Adjust 12
V
in
Ground
4
-25擄C to +85擄C
14-pin double-wide DIP
KH104
11 V
o
13 -V
R
*
-5.4V
Reg
2
*Pins 3, 5-10 case is ground
REV. 1A February 2001
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