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參數(shù)資料
| 型號： | LM1202 |
| 廠商： | National Semiconductor Corporation |
| 元件分類： | 視頻放大器 |
| 英文描述： | LM1202 230 MHz Video Amplifier System |
| 中文描述： | LM1202 230兆赫視頻放大器系統(tǒng) |
| 文件頁數(shù)： | 6/18頁 |
| 文件大?。?/td> | 290K |
| 代理商： | LM1202 |
Circuit Description
(Continued)
pin 8 produces a control voltage at pin 3 which drives the
base of Q9. By varying the voltage at the base of Q9, Q8’s
collector current (I
C8
) is diverted away from the load resis-
tors R10 and R11, thereby providing signal attenuation.
Maximum attenuation is achieved when all of I
C8
flows
through Q9 and no current flows through the load resistors.
The differential pair Q11 and Q12 provide drive control.
Q12’s base is internally biased at 7.3V. Adjusting the volt-
age at the drive control input (pin 9) produces a control
voltage at the base of Q11. With Q9 off and Q12 off, all of
I
C8
flows through R10, thus providing a gain of A
V1
e
b
(R10/R9)
c
V
IN
e b
1. Drive control thus provides a
6 dB attenuation range.
TL/H/11440–4
FIGURE 3. Simplified Schematic of the LM1202 Video Amplifier Input Stage
http://www.national.com
6
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| LM1202M | LM1202 230 MHz Video Amplifier System |
| LM1202N | LM1202 230 MHz Video Amplifier System |
| LM12021 | |
| LM1203C | RGB VIDEO-AMPLIFIER SYSTEM |
| LM120H-12 | Series 3-Terminal Negative Regulators |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LM12021 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述: |
| LM1202M | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM1202 230 MHz Video Amplifier System |
| LM1202N | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:LM1202 230 MHz Video Amplifier System |
| LM1203 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:RGB Video Amplifier System |
| LM1203A | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:150 MHz RGB Video Amplifier System(304.24 k) |
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