參數(shù)資料
型號(hào)： THS4011JG
廠商： Texas Instruments, Inc.
英文描述： 290-MHz LOW-DISTORTION HIGH-SPEED AMPLIFIERS
中文描述： 290 - MHz的低失真高速放大器
文件頁數(shù)： 19/30頁
文件大小： 439K
代理商： THS4011JG
THS4011, THS4012
290-MHz LOW-DISTORTION HIGH-SPEED AMPLIFIERS
SLOS216B – JUNE 1999 – FEBRUARY 2000
19
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
general configurations
When receiving low-level signals, limiting the bandwidth of the incoming signals into the system is often
required. The simplest way to accomplish this is to place an RC filter at the noninverting terminal of the amplifer
(see Figure 31).
VI
VO
C1
+
–
RG
RF
R1
f–3dB
1
2 R1C1
VO
VI
1
RF
RG
1
1
sR1C1
Figure 31. Single-Pole Low-Pass Filter
If even more attenuation is needed, a multiple pole filter is required. The Sallen-Key filter can be used for this
task. For best results, the amplifier should have a bandwidth that is 8 to 10 times the filter frequency bandwidth.
Failure to do this can result in phase shift of the amplifier.
VI
C2
R2
R1
C1
RF
RG
R1 = R2 = R
C1 = C2 = C
Q = Peaking Factor
(Butterworth Q = 0.707)
(
=
1
Q
2 –
)
RG
RF
_
+
f–3dB
1
2 RC
Figure 32. 2-Pole Low-Pass Sallen-Key Filter
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THS4012 制造商:TI 制造商全稱:Texas Instruments 功能描述:290-MHz LOW-DISTORTION HIGH-SPEED AMPLIFIERS
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