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參數資料
| 型號： | HA2556 |
| 廠商： | Intersil Corporation |
| 英文描述： | Wideband Four Quadrant Analog Multiplier (Voltage Output) |
| 中文描述： | 寬帶四象限模擬乘法器（電壓輸出） |
| 文件頁數： | 14/20頁 |
| 文件大?。?/td> | 205K |
| 代理商： | HA2556 |
DESIGN INFORMATION
(Continued)
The information contained in this section has been developed through characterization by Intersil Semiconductor and is for use as
application and design information only. No guarantee is implied.
8-20
HA2556
Square Root
The Square Root function can serve as a precision/wide
bandwidth compander for audio or video applications. A
compander improves the Signal to Noise Ratio for your sys-
tem by amplifying low level signals while attenuating or com-
pressing large signals (refer to Figure 17; X
0.5
curve). This
provides for better low level signal immunity to noise during
transmission. On the receiving end the original signal may
be reconstructed with the standard Square function.
FIGURE 6. AM SIGNAL GENERATION
FIGURE 7. SYNCHRONOUS AM DETECTION
FIGURE 8. PHASE DETECTION
HA-2556
1/5V
X
Y
V
OUT
Z
V
X
+
V
X
-
V
Y
+
V
Y
-
V
Z
+
V
Z
-
∑
W
ACos(
ω
Α
τ
)
CCos(
ω
C
τ
)
CARRIER
AUDIO
W
------
Cos
ω
C
ω
A
–
(
)
τ
Cos
ω
C
ω
A
+
(
)
τ
+
(
)
=
+
-
+
-
A
+
-
+
-
HA-2556
1/5V
X
Y
V
OUT
Z
V
X
+
V
X
-
V
Y
+
V
Y
-
V
Z
+
V
Z
-
∑
W
AM SIGNAL
CARRIER
LIKE THE FREQUENCY DOUBLER YOU GET AUDIO CENTERED AT DC
AND 2F
C
.
+
-
+
-
A
+
-
+
-
HA-2556
1/5V
X
Y
V
OUT
Z
V
X
+
V
X
-
V
Y
+
V
Y
-
V
Z
+
V
Z
-
∑
W
ACos(
ωτ
)
ACos(
ωτ+φ
)
W
A2
-----
Cos
φ
( )
(
Cos 2
ωτ
φ
+
)
+
)
=
DC COMPONENT IS PROPORTIONAL TO Cos(f).
+
-
+
-
A
+
-
+
-
Communications
The Multiplier configuration has applications in AM Signal Gener-
ation, Synchronous AM Detection and Phase Detection to men-
tion a few. These circuit configurations are shown in Figure 6,
Figure 7 and Figure 8. The HA-2556 is particularly useful in
applications that require high speed signals on all inputs.
Each input X, Y and Z has similar wide bandwidth and input
characteristics. This is unlike earlier products where one
input was dedicated to a slow moving control function as is
required for Automatic Gain Control. The HA-2556 is versa-
tile enough for both.
Although the X and Y inputs have similar AC characteristics, they
are not the same. The designer should consider input parame-
ters such as small signal bandwidth, ac feedthrough and 0.1dB
gain flatness to get the most performance from the HA-2556.
The Y channel is the faster of the two inputs with a small signal
bandwidth of typically 57MHz verses 52MHz for the X channel.
Therefore in AM Signal Generation, the best performance will be
obtained with the Carrier applied to the Y channel and the modu-
lation signal (lower frequency) applied to the X channel.
Scale Factor Control
The HA-2556 is able to operate over a wide supply voltage range
±
5V to
±
17.5V. The
±
5V range is particularly useful in video appli-
cations. At
±
5V the input voltage range is reduced to
±
1.4V. The
output cannot reach its full scale value with this restricted input,
so it may become necessary to modify the scale factor. Adjusting
the scale factor may also be useful when the input signal itself is
restricted to a small portion of the full scale level. Here we can
make use of the high gain output amplifier by adding external
gain resistors. Generating the maximum output possible for a
given input signal will improve the Signal to Noise Ratio and
Dynamic Range of the system. For example, let’s assume that
the input signals are 1V
PEAK
each. Then the maximum output for
the HA-2556 will be 200mV. (1V x 1V / (5V) = 200mV. It would be
nice to have the output at the same full scale as our input, so let’s
add a gain of 5 as shown in Figure 9.
FIGURE 9. EXTERNAL GAIN OF 5
One caveat is that the output bandwidth will also drop by this
factor of 5. The multiplier equation then becomes:
HA-2556
1/5V
X
Y
V
OUT
Z
V
X
+
V
X
-
V
Y
+
V
Y
-
V
Z
+
V
Z
-
∑
W
A
B
1k
R
F
250
R
G
ExternalGain
RF
RG
------
1
+
=
+
+
-
A
+
-
+
-
W
--------
A
B
×
=
=
Spec Number
511063-883
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相關代理商/技術參數 |
參數描述 |
|---|---|
| HA-2556 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:57MHz, Wideband, Four Quadrant, Voltage Output Analog Multiplier |
| HA2556/883 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Wideband Four Quadrant Analog Multiplier (Voltage Output) |
| HA-2556/883 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Wideband Four Quadrant Analog Multiplier (Voltage Output) |
| HA-2556_08 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:57MHz, Wideband, Four Quadrant, Voltage Output Analog Multiplier |
| HA2556883 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Wideband Four Quadrant Analog Multiplier (Voltage Output) |
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