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參數(shù)資料
| 型號(hào)： | LM13600 |
| 廠商： | National Semiconductor Corporation |
| 元件分類(lèi)： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers |
| 中文描述： | 雙路運(yùn)算跨導(dǎo)放大器的線性化二極管和緩沖器 |
| 文件頁(yè)數(shù)： | 9/24頁(yè) |
| 文件大?。?/td> | 634K |
| 代理商： | LM13600 |
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Stereo Volume Control
(Continued)
The constant term in the above equation may be cancelled
by feeding I
x I
D
R
/2 (V
+ 1.4V) into I
. The circuit of Fig-
ure 6 adds R
to provide this current, resulting in a
four-quadrant multiplier where R
is trimmed such that V
O
=
0V for V
IN2
= 0V. R
M
also serves as the load resistor for I
O
.
Noting that the gain of the LM13600 amplifier of Figure 3
may be controlled by varying the linearizing diode current I
D
as well as by varying I
, Figure 7 shows an AGC Amplifier
using this approach.As V
reaches a high enough amplitude
(3 V
) to turn on the Darlington transistors and the lineariz-
ing diodes, the increase in I
D
reduces the amplifier gain so
as to hold V
O
at that level.
Voltage Controlled Resistors
An Operational Transconductance Amplifier (OTA) may be
used to implement a Voltage Controlled Resistor as shown in
Figure 8 A signal voltage applied at R
generates a V
to
the LM13600 which is then multiplied by the g
m
of the ampli-
fier to produce an output current, thus:
where g
≈
19.2 I
at 25C. Note that the attenuation of
V
by R and R
is necessary to maintain V
IN
within the linear
range of the LM13600 input.
Figure 9 shows a similar VCR where the linearizing diodes
are added, essentially improving the noise performance of
the resistor. A floating VCR is shown in Figure 10 where
each “end” of the “resistor” may be at any voltage within the
output voltage range of the LM13600.
DS007980-12
FIGURE 5. Amplitude Modulator
DS007980-13
FIGURE 6. Four-Quadrant Multiplier
www.national.com
9
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM13600AN | Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers |
| LM13600M | Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers |
| LM13600N | Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers |
| LM13700 | Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers |
| LM13700AN | Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM13600AN | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers |
| LM13600AN/B+ | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Transconductance Operational Amplifier |
| LM13600M | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:Dual Operational Transconductance Amplifiers with Linearizing Diodes and Buffers |
| LM13600MX | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
| LM13600N | 制造商:Texas Instruments 功能描述: |
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