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参数资料
| 型号： | AU5517 |
| 厂商： | ON SEMICONDUCTOR |
| 元件分类： | 运动控制电子 |
| 英文描述： | Dual Operational Transconductance Amplifier(双运算跨导放大器) |
| 中文描述： | 双路运算跨导放大器（双运算跨导放大器） |
| 文件页数： | 10/14页 |
| 文件大小： | 186K |
| 代理商： | AU5517 |
NE5517, NE5517A, AU5517
http://onsemi.com
10
Voltage-Controlled Resistor (VCR)
Because an OTA is capable of producing an output current
proportional to the input voltage, a voltage variable resistor
can be made. Figure 26 shows how this is done. A voltage
presented at the R
X
terminals forces a voltage at the input.
This voltage is multiplied by g
M
and thereby forces a current
through the R
X
terminals:
R
g
M
where g
M
is approximately 19.21
temperature. Figure 27 shows a Voltage Controlled Resistor
using linearizing diodes. This improves the noise
performance of the resistor.
R
x
R
A
R
A
MHOs at room
Voltage-Controlled Filters
Figure 28 shows a Voltage Controlled Low-Pass Filter.
The circuit is a unity gain buffer until X
C
/g
M
is equal to
R/R
A
. Then, the frequency response rolls off at a 6dB per
octave with the 3 dB point being defined by the given
equations. Operating in the same manner, a Voltage
Controlled High-Pass Filter is shown in Figure 29. Higher
order filters can be made using additional amplifiers as
shown in Figures 30 and 31.
Voltage-Controlled Oscillators
Figure 32 shows a voltage-controlled triangle-square
wave generator. With the indicated values a range from
2.0 Hz to 200 kHz is possible by varying I
ABC
from 1.0 mA
to 10 A.
The output amplitude is determined by I
OUT
×
R
OUT
.
Please notice the differential input voltage is not allowed
to be above 5.0 V.
With a slight modification of this circuit you can get the
sawtooth pulse generator, as shown in Figure 33.
APPLICATION HINTS
To hold the transconductance g
M
within the linear range,
I
ABC
should be chosen not greater than 1.0 mA. The current
mirror ratio should be as accurate as possible over the entire
current range. A current mirror with only two transistors is
not recommended. A suitable current mirror can be built
with a PNP transistor array which causes excellent matching
and thermal coupling among the transistors. The output
current range of the DAC normally reaches from 0 to
2.0 mA. In this application, however, the current range is
set through R
REF
(10 k ) to 0 to 1.0 mA.
I
DACMAX
2
V
REF
R
REF
2
5V
10k
1mA
V
CC
4
3
+
NE5517/A
8
V
OUT
V
CC
INT
11
+V
CC
R
X
5
I
O
2
R
7
INT
C
+V
CC
V
C
RX
R
RA
RA
gM
Figure 26. VCR
30k
200
200
100k
10k
V
CC
4
3
NE5517/A
8
V
CC
INT
11
+V
CC
R
X
5
I
D
2
R
7
INT
C
+V
CC
V
C
+V
CC
V
OS
R
P
1
6
Figure 27. VCR with Linearizing Diodes
30k
1k
100k
10k
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AU5517D | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Dual operational transconductance amplifier |
| AU5517DR2 | 功能描述:跨导放大器 Transconductance RoHS:否 制造商:Texas Instruments 通道数量:1 封装 / 箱体:SOIC-14 带宽: 输入补偿电压:40 mV at +/- 5 V 电源电压-最大:+/- 5 V 电源电流: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| AU5517DR2G | 功能描述:跨导放大器 TWO CURRENT- CONTROLLED TR RoHS:否 制造商:Texas Instruments 通道数量:1 封装 / 箱体:SOIC-14 带宽: 输入补偿电压:40 mV at +/- 5 V 电源电压-最大:+/- 5 V 电源电流: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装:Tube |
| AU5544-WH | 制造商:Pass & Seymour/Legrand 功能描述:LYRIQ STUDIO MLT-SRC 4-Z KIT |
| AU5780 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:SAE/J1850/VPW transceiver |
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