barcode fonts for ssrs LOW-FREQUENCY EFFECT OF BYPASS AND COUPLING CAPACITORS in Software

Creating USS Code 39 in Software LOW-FREQUENCY EFFECT OF BYPASS AND COUPLING CAPACITORS

LOW-FREQUENCY EFFECT OF BYPASS AND COUPLING CAPACITORS
Decode Code 39 In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Create Code 3/9 In None
Using Barcode drawer for Software Control to generate, create Code 3 of 9 image in Software applications.
As the frequency of the input signal to an ampli er decreases below the midfrequency range, the voltage (or current) gain ratio decreases in The low-frequency cuto point !L is the p magnitude. frequency at which the gain ratio equals 1= 2 0:707 times its midfrequency value [Fig. 8-1(a)], or at which Mdb has decreased by exactly 3 db from its midfrequency value. The range of frequencies below !L is called the low-frequency region. Low-frequency ampli er performance (attenuation, really) is a consequence of the use of bypass and coupling capacitors to fashion the dc bias characteristics. When viewed from the low-frequency region, such ampli er response is analogous to that of a high-pass
Read Code 3 Of 9 In None
Using Barcode reader for Software Control to read, scan read, scan image in Software applications.
Encoding Code 39 Full ASCII In C#
Using Barcode generation for .NET Control to generate, create Code 3 of 9 image in .NET framework applications.
FREQUENCY EFFECTS IN AMPLIFIERS
Drawing Code 39 In Visual Studio .NET
Using Barcode maker for ASP.NET Control to generate, create Code-39 image in ASP.NET applications.
Code-39 Creation In .NET
Using Barcode creator for VS .NET Control to generate, create Code39 image in .NET applications.
[CHAP. 8
Print Code39 In VB.NET
Using Barcode generation for .NET Control to generate, create ANSI/AIM Code 39 image in .NET framework applications.
UPCA Maker In None
Using Barcode maker for Software Control to generate, create GTIN - 12 image in Software applications.
lter (signals for which ! < !L are appreciably attenuated, whereas higher-frequency signals with ! ! !L are unattenuated).
Create Bar Code In None
Using Barcode printer for Software Control to generate, create barcode image in Software applications.
EAN13 Drawer In None
Using Barcode creator for Software Control to generate, create EAN / UCC - 13 image in Software applications.
Example 8.5. For the ampli er of Fig. 3-10, assume that CC ! 1 but that the bypass capacitor CE cannot be neglected. Also, let hre hoe % 0 and Ri 0. Find an expression that is valid for small signals and that gives (a) the voltage-gain ratio Av s at any frequency; then nd (b) the voltage-gain ratio at low frequencies, (c) the voltage-gain ratio at higher frequencies, and (d) the low-frequency cuto point. (e) Sketch the asymptotic Bode plot for the ampli er (amplitude ratio only). (a) The small-signal low-frequency equivalent circuit (with the approximation implemented) is displayed in Fig. 8-4. In the Laplace domain, we have ZE RE k 1 R 1=sCE RE E sCE RE 1=sCE sRE CE 1
Data Matrix 2d Barcode Creator In None
Using Barcode creation for Software Control to generate, create ECC200 image in Software applications.
Barcode Generator In None
Using Barcode creator for Software Control to generate, create barcode image in Software applications.
hfe ib C
EAN8 Printer In None
Using Barcode generator for Software Control to generate, create EAN-8 Supplement 5 Add-On image in Software applications.
Bar Code Creation In Objective-C
Using Barcode generation for iPhone Control to generate, create bar code image in iPhone applications.
8:11
GTIN - 13 Generator In Objective-C
Using Barcode drawer for iPad Control to generate, create EAN-13 image in iPad applications.
Read Barcode In VB.NET
Using Barcode scanner for Visual Studio .NET Control to read, scan read, scan image in .NET framework applications.
Vsen
EAN128 Scanner In C#
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
Linear Generation In Visual Basic .NET
Using Barcode generator for VS .NET Control to generate, create 1D Barcode image in VS .NET applications.
ib iE
Code128 Reader In C#
Using Barcode scanner for .NET Control to read, scan read, scan image in .NET framework applications.
Create Code-39 In Java
Using Barcode creation for Eclipse BIRT Control to generate, create Code 39 Full ASCII image in Eclipse BIRT applications.
+ RB RE CE RC RL
LL _
Z in
Fig. 8-4
We next note that IE Ib hfe Ib hfe 1 Ib Then KVL and (8.12) yield Vi hie Ib ZE IE hie hfe 1 ZE Ib But, by Ohm s law, VL hfe Ib RC kRL hfe RC RL I RC RL b 8:14 8:13 8:12
Solving (8.13) for Ib , substituting the result into (8.14), using (8.11), and rearranging give the desired voltagegain ratio: Av s hfe RC RL VL sRE CE 1 Vi RC RL sRE CE hie hie hfe 1 RE 8:15
(b) The low-frequency voltage-gain ratio is obtained by letting s ! 0 in (8.15): Av 0 lim hfe RC RL VL Vi RC RL hie hfe 1 RE 8:16
Comparison of ( 8.16) with (1) of Problem 6.7 (but with hoe 0) shows that inclusion of the bypass capacitor in the analysis can signi cantly change the expression one obtains for the voltage-gain ratio. (c) The higher-frequency (midfrequency) voltage-gain ratio is obtained by letting s ! 1 in (8.15): Av 1 lim   hfe RC RL hfe RC RL VL RE CE 1=s lim s!1 Vi RC RL RE CE hie hie hfe 1 RE =s hie RC RL 8:17
CHAP. 8]
FREQUENCY EFFECTS IN AMPLIFIERS
(d) Equation (8.15) can be rearranged to give Av s hfe RC RL RC RL hie hfe 1 RE sRE CE 1 RE CE hie s 1 hie hfe 1 RE 8:18
which clearly is of the form Av s kv Thus, we may use (8.18) to write !1 and !2 1 1 1 CE RE 1 hie hfe 1 RE 2 RE CE hie (8.19) (8.20) 1 s 1 2 s 1
Typically, hfe ) 1 and hfe RE ) hie , so a reasonable approximation of !2 is !2 % 1 CE hie =hfe 8:21
Since hie =hfe is typically an order of magnitude smaller than RE , !2 is an order of magnitude greater than !1 , and !L !2 . (e) The low- and midfrequency asymptotic Bode plot is depicted in Fig. 8-5, where !1 and !2 are given by (8.19) and (8.21), respectively. From (8.16) and (8.17), hfe RC RL MdbL 20 log (8.22) RC RL hie hfe 1 RE and MdbM 20 log hfe RC RL hie RC RL (8.23)
Copyright © OnBarcode.com . All rights reserved.