音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

AB-193 Datasheet

  • AB-193

  • AB-193 - THE CURRENT-FEEDBACK OP AMP A HIGH-SPEED BUILDING B...

  • 12頁

  • ETC

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

廬
APPLICATION BULLETIN
THE CURRENT-FEEDBACK OP AMP
A HIGH-SPEED BUILDING BLOCK
By Anthony D. Wang, Burr-Brown Corp.
Mailing Address: PO Box 11400 鈥?Tucson, AZ 85734 鈥?Street Address: 6730 S. Tucson Blvd. 鈥?Tucson, AZ 85706
Tel: (602) 746-1111 鈥?Twx: 910-952-111 鈥?Telex: 066-6491 鈥?FAX (602) 889-1510 鈥?Immediate Product Info: (800) 548-6132
1
2
3
4
5
Although current-feedback amplifiers (CFAs) have been in
use for quite some time, there is a reluctance to view them
in the same light as voltage-feedback amplifiers (VFAs). For
instance, the gain-bandwidth curve of VFAs has a parallel
in a transimpedance-bandwidth curve for CFAs. This pa-
rameter can be used to determine the closed-loop behavior
of the CFA in the same way that GBW can for the VFA. Not
all the fault is with the users鈥攖he amplifier manufacturers
have not standardized the CFA characterization as they
have done with VFAs. This paper describes the CFA and its
behavior in an intuitive manner.
HISTORICAL PERSPECTIVE
The term 鈥渙perational amplifier,鈥?or 鈥渙p amp鈥?in typical
engineering shorthand, has generally been associated with
the transistorized voltage-feedback amplifier. It is becoming
more acceptable now to include the current-feedback ampli-
fier in the same category.
Interestingly enough, the basic architecture for the CFA
might have predated the VFA although it was not until the
1980s that the CFA was itself repopularized. To appreciate
the evolution of the beast, it helps to look back to some early
discrete transistor circuits.
The three transistor amplifier of Figure 1 is arranged in a
series-shunt configuration. However, in order to analyze the
amplifier, the circuit is rearranged as shown in Figure 2.
The feedback network shows up in two places鈥攁 series
network at the output and a parallel network at the emitter of
the input transistor. This allows for open-loop analysis while
keeping the effects of loading intact.
The loading of the output by the feedback network is
generally not a problem. However, the gain of the first
transistor stage is dependent on the values of the resistors in
the feedback network. Thus the open-loop response will
change with closed-loop gain (as the feedback network
changes), which could make frequency compensation an
iterative chore.
The discrete transistor circuit of Figure 3 circumvents this
difficulty. Adding another transistor, Q
4
, to buffer the input
stage transistor, Q
1
, from the feedback network illustrates
this modification. This is the first step to a voltage feedback
amplifier topology.
6
R
1
R
2
R
1
R
2
Q
2
C
T
V
IN
Q
1
R
F
V
OUT
R
F
鈥?/div>
R
G
R
F
+ R
G
Q
3
V
IN
Q
1
C
T
Q
2
Q
3
V
OUT
R
G
R
3
R
E
=
R
3
R
L
= R
F
+ R
G
FIGURE 1. Three Transistor Amplifier.
FIGURE 2. Amplifier Redrawn for Analysis.
AB-193

AB-193相關(guān)型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    Application Bulletin AB-12
    FAIRCHILD
  • 英文版
    Application Bulletin AB-12
    FAIRCHILD ...
  • 英文版
    AB-100 - MULTIPLEXER DATA ACQUISTION SYSTEM
    ETC
  • 英文版
    AB-101 - COMBINING AN AMPLIFIER WITH THE BUF634
    ETC
  • 英文版
    AB-102 - OUTPUT SPECTRUM AND POST-LPF DESIGN OF THE PCM1710
    ETC
  • 英文版
    AB-103 - NOISE ANALYSIS FOR HIGH SPEED OP AMPS
    ETC
  • 英文版
    ETC
  • 英文版
    AB-105 - TUNING IN AMPLIFIERS
    ETC
  • 英文版
    AB-106 - PROGRAMMING TRICKS FOR HIGHER CONVERSION SPEEDS UTI...
    ETC
  • 英文版
    AB-107 - GIVING CONVERTERS A LITTLE GAIN BOOST WITH A FRONT ...
    ETC
  • 英文版
    AB-109 - ADS7809 TAG FEATURE
    ETC
  • 英文版
    AB-110 - VOLTAGE REFERENCE SCALING TECHNIQUES Increase the A...
    ETC
  • 英文版
    AB-111 - DEM-ADS1210
    ETC
  • 英文版
    ETC
  • 英文版
    AB-113 - ACCESSING THE ADS1210 DEMO BOARD WITH YOUR PC
    ETC
  • 英文版
    AB-115 - OVERDRIVING THE INPUTS TO THE ADS1210. ADS1211. ADS...
    ETC
  • 英文版
    ETC
  • 英文版
    ETC
  • 英文版
    AB-118 - EXTRACT AND DIGITIZE AC SIGNALS WITH A SINGLE A
    ETC
  • 英文版
    ＂AB-119 - A ＂＂GETTING STARTED＂＂ GUIDE FOR THE CONVERTER...
    ETC

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時間周一至周五
9:00-17:30

關(guān)注官方微信號，
第一時間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務(wù)的動力！意見一經(jīng)采納，將有感恩紅包奉上哦！