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參數(shù)資料
| 型號(hào)： | LT1228 |
| 廠商： | Linear Technology Corporation |
| 英文描述： | 100MHz Current Feedback Amplifier with DC Gain Control(100MHz ，電流反饋放大器（帶直流增益控制）) |
| 中文描述： | 100MHz的電流反饋放大器的直流增益控制（100MHz時(shí)，電流反饋放大器（帶直流增益控制）） |
| 文件頁數(shù)： | 18/20頁 |
| 文件大小： | 357K |
| 代理商： | LT1228 |
LT1228
18
Voltage Controlled State Variable Filter
LT1228 TA18
–
+
–
+
g
m
CFA
LOWPASS
OUTPUT
8
3
2
1k
4
1
6
100
18pF
–5V
3.3k
7
5
–
+
–
+
g
m
CFA
BANDPASS
OUTPUT
8
3
2
1k
4
1
6
100
18pF
–5V
3.3k
7
5
100
V
IN
5V
5V
3k
3k
–
+
100pF
LT1006
1k
180
10k
V
C
51k
–5V
2N3906
3.3k
3.3k
f
O
= 100kHz AT V
C
= 0V
f
O
= 200kHz AT V
C
= 1V
f
O
= 400kHz AT V
C
= 2V
f
O
= 800kHz AT V
C
= 3V
f
O
= 1.6MHz AT V
C
= 4V
U
S
A
O
PPLICATI
TYPICAL
The state variable filter has both lowpass and bandpass
outputs. Each LT1228 is configured as a variable integra-
tor whose frequency is set by the attenuators, the capaci-
tors and the set current. Because the integrators have both
positive and negative inputs, the additional op amp nor-
mally required is not needed. The input attenuators set the
circuit up to handle 3V
P–P
signals.
The set current is generated with a simple circuit that gives
logarithmic voltage to current control. The two PNP tran-
sistors should be a matched pair in the same package for
best accuracy. If discrete transistors are used, the 51k
resistor should be trimmed to give proper frequency
response with V
C
equal zero. The circuit generates 100
μ
A
for V
C
equal zero volts and doubles the current for every
additional volt. The two 3k resistors divide the current
between the two LT1228s. Therefore the set current of
each amplifier goes from 50
μ
A to 800
μ
A for a control
voltage of 0V to 4V. The resulting filter is at 100kHz for V
C
equal zero, and changes it one octave/V of control input.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LT1228_07 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:100MHz Current Feedback Amplifier with DC Gain Control |
| LT1228_12 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:100MHz Current Feedback |
| LT1228C | 制造商:LINER 制造商全稱:Linear Technology 功能描述:100MHz Current Feedback Amplifier with DC Gain Control |
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| LT1228CN8 | 功能描述:IC CURRNT FEEDBCK AMP100MHZ 8DIP RoHS:否 類別:集成電路 (IC) >> Linear - Amplifiers - Instrumentation 系列:- 標(biāo)準(zhǔn)包裝:73 系列:Over-The-Top® 放大器類型:通用 電路數(shù):4 輸出類型:滿擺幅 轉(zhuǎn)換速率:0.07 V/µs 增益帶寬積:200kHz -3db帶寬:- 電流 - 輸入偏壓:1nA 電壓 - 輸入偏移:285µV 電流 - 電源:50µA 電流 - 輸出 / 通道:25mA 電壓 - 電源，單路/雙路(±):2 V ~ 44 V，±1 V ~ 22 V 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:16-WFDFN 裸露焊盤 供應(yīng)商設(shè)備封裝:16-DFN-EP（5x3） 包裝:管件 |
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