- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄385351 > HA-2556 (Intersil Corporation) 57MHz, Wideband, Four Quadrant,Voltage Output Analog Multiplier(57MHz,寬頻,四象限,電壓輸出模擬乘法器) PDF資料下載
參數(shù)資料
| 型號(hào)： | HA-2556 |
| 廠商： | Intersil Corporation |
| 英文描述： | 57MHz, Wideband, Four Quadrant,Voltage Output Analog Multiplier(57MHz,寬頻,四象限,電壓輸出模擬乘法器) |
| 中文描述： | 57MHz，寬帶，四象限，電壓輸出模擬乘法器（57MHz，寬頻，四象限，電壓輸出模擬乘法器） |
| 文件頁數(shù)： | 6/15頁 |
| 文件大小： | 245K |
| 代理商： | HA-2556 |
6
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
system by amplifying low level signals while attenuating or
compressing 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.
Communications
The Multiplier configuration has applications in AM Signal
Generation, Synchronous AM Detection and Phase
Detection to mention a few. These circuit configurations are
shown in Figures 6, 7 and 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
versatile enough for both.
Although the X and Y inputs have similar AC characteristics,
they are not the same. The designer should consider input
parameters 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 versus
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 modulation 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 applications. 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.
One caveat is that the output bandwidth will also drop by this
factor of 5. The multiplier equation then becomes:
Current Output
Another useful circuit for low voltage applications allows the
user to convert the voltage output of the HA2556 to an output
current. The HA-2557 is a current output version offering
100MHz of bandwidth, but its scale factor is fixed and does not
have an output amplifier for additional scaling. Fortunately the
circuit in Figure 10 provides an output current that can be
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
FIGURE 6. AM SIGNAL GENERATION
--------
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
+
-
+
-
FIGURE 7. SYNCHRONOUS AM DETECTION
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
2
------
Cos
φ
(
( )
Cos 2
ωτ
φ
+
)
+
=
DC COMPONENT IS PROPORTIONAL TO COS(f)
+
-
+
-
A
+
-
+
-
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
A
B
1k
R
F
250
R
G
ExternalGain
R
F
R
G
--------
1
+
=
+
-
+
-
A
+
-
+
-
FIGURE 9. EXTERNAL GAIN OF 5
W
-----------
A
B
×
=
=
HA-2556
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| HA-2841 | 50MHz, Fast Settling, Unity Gain Stable, Video Operational Amplifier(50MHz、增益穩(wěn)定的視頻運(yùn)算放大器) |
| HA-2842 | 80MHz, High Slew Rate, High Output Current, Video Operational Amplifier(80MHz、高偏移高輸出電流視頻運(yùn)算放大器) |
| HA-2850883 | Low Power, High Slew Rate, Wideband Operational Amplifier |
| HA-2870 | Differential Positive ECL (DPECL) |
| HA-A2870-FREQ | Differential Positive ECL (DPECL) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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) |
| HA2557 | 制造商:INTERSIL 制造商全稱:Intersil Corporation 功能描述:Wideband Four Quadrant Analog Multiplier (Current Output) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。