barcode fonts for ssrs SMALL-SIGNAL MIDFREQUENCY FET AND TRIODE AMPLIFIERS in Software

Making USS Code 39 in Software SMALL-SIGNAL MIDFREQUENCY FET AND TRIODE AMPLIFIERS

SMALL-SIGNAL MIDFREQUENCY FET AND TRIODE AMPLIFIERS
Reading Code 3/9 In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Code 39 Full ASCII Creator In None
Using Barcode creation for Software Control to generate, create Code 39 image in Software applications.
Fig. 7-20
Scanning Code-39 In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
Make ANSI/AIM Code 39 In C#.NET
Using Barcode creation for Visual Studio .NET Control to generate, create Code 3/9 image in VS .NET applications.
the marked spectra magnitudes with the negative sign accounting for the 1808 phase shift observed from inspection of the instantaneous waveforms. Av vL 0:621 2:48 0:250 vS
Creating Code-39 In .NET Framework
Using Barcode encoder for ASP.NET Control to generate, create Code-39 image in ASP.NET applications.
Making Code 39 In VS .NET
Using Barcode generator for .NET Control to generate, create Code-39 image in VS .NET applications.
In the cascaded MOSFET ampli er of Fig. 7-21, CC ! 1. Av vL =vi and (b) the current-gain ratio Ai iL =ii .
Code 3/9 Generation In Visual Basic .NET
Using Barcode drawer for .NET framework Control to generate, create Code 39 image in .NET applications.
Generate EAN128 In None
Using Barcode printer for Software Control to generate, create GS1 128 image in Software applications.
Find
Creating Data Matrix In None
Using Barcode creator for Software Control to generate, create ECC200 image in Software applications.
Code 128 Code Set C Generation In None
Using Barcode maker for Software Control to generate, create Code 128 Code Set C image in Software applications.
(a) the voltage-gain ratio
Making Code 39 Extended In None
Using Barcode drawer for Software Control to generate, create Code 39 image in Software applications.
Printing EAN-13 In None
Using Barcode creator for Software Control to generate, create EAN 13 image in Software applications.
RD1 CC
ITF-14 Creation In None
Using Barcode creator for Software Control to generate, create ITF-14 image in Software applications.
Code 128C Creator In Objective-C
Using Barcode creation for iPhone Control to generate, create Code 128A image in iPhone applications.
RD2 CC iL
Data Matrix Scanner In Visual Studio .NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in .NET framework applications.
UCC - 12 Creation In Java
Using Barcode creator for Android Control to generate, create Universal Product Code version A image in Android applications.
gm1 rds1
Barcode Maker In Objective-C
Using Barcode maker for iPhone Control to generate, create barcode image in iPhone applications.
Code 39 Maker In Java
Using Barcode maker for Android Control to generate, create Code 39 image in Android applications.
gm2 rds2 RL + LL _
Make ANSI/AIM Code 128 In None
Using Barcode generator for Font Control to generate, create Code-128 image in Font applications.
Data Matrix Drawer In Objective-C
Using Barcode drawer for iPad Control to generate, create Data Matrix ECC200 image in iPad applications.
R12 _
Fig. 7-21
SMALL-SIGNAL MIDFREQUENCY FET AND TRIODE AMPLIFIERS
[CHAP. 7
(a) The small-signal equivalent circuit is given in Fig. 7-22. Using the result of Example 7.1, but replacing RD with RD1 kRG2 where RG2 R21 kR22 , we have Av1 gm1 rds1 RD1 kRG2 rds1 RD1 kRG2
G2 gm1 Lgs1 rds1 RD1 RG2 +
Lgs2
iL gm2Lgs2 RD2 rds2 + LL _
G1 +
+ RG1
Lgs1
Fig. 7-22 gm2 rds2 RD2 kRL rds2 RD2 kRL gm1 gm2 rds1 rds2 RD1 kRG2 RD2 kRL rds1 RD1 kRG2 rds2 RD2 kRL
Similarly, Then
Av2 Av Av1 Av2
(2) (3)
(b) Realizing that RG1 R11 kR12 , we have Ai where Av is given by (3). iL v =R R o L Av G1 ii vi =RG1 RL
For the JFET-BJT Darlington ampli er of Fig. 7-23(a), nd (a) the voltage-gain ratio Av ve =vi and (b) the output impedance Ro . Assume hre hoe 0 and that RG ) R1 ; R2 .
RG + R1 G
rds m+1 + m L m + 1 gd _ D (b)
hie E + R1
hfeib
_ R2
_ Ro (a)
Fig. 7-23 (a) The small-signal equivalent circuit is given in Fig. 7-23(b), where the CD model of the JFET (see Problem 7.5) has been used. Since ib id and vgd vi , KVL yields    rds vi id hie hfe 1 id R1 R2  1  1
CHAP. 7]
SMALL-SIGNAL MIDFREQUENCY FET AND TRIODE AMPLIFIERS
By Ohm s law, ve hfe 1 id R1 R2 Solving (1) for id , substituting the result into (2), and rearranging give Av  hfe 1 R1 R2 ve vi rds  1 hie hfe 1 R1 R2 2
(b) We replace R1 R2 with a driving-point source oriented such that vdp ve . With vi deactivated (short circuited), vgd 0. Then, by Ohm s law, ib and by KCL, idp hfe 1 ib Substituting (3) into (4) and rearranging give Ro vdp rds  1 hie idp  1 hfe 1 4 vdp hie rds =  1 3
For a triode with plate characteristics given by Fig. 7-8, nd (a) the perveance  and (b) the ampli cation factor .
(a) The perveance can be evaluated at any point on the vG 0 curve. Choosing the point with coordinates iP 15 mA and vP 100 V, we have, from (4.9),  iP
3=2 vP
15 10 3 15 A=V3=2 1003=2
(b) The ampli cation factor is most easily evaluated along the vP axis. From (4.9), for the point iP 0, vP 100 V; vG 4 V, we obtain  vP 100 25 4 vG
Use the current-source small-signal triode model of Fig. 7-9(a) to derive the voltage-source model of Fig. 7-9(b).
We need to nd the Thevenin equivalent for the circuit to the left of the output terminals in Fig. 7-9(a). If the independent source is deactivated, then vg 0; thus, gm vg 0, and the dependent current source acts as an open circuit. The Thevenin resistance is then RTh rp . The open-circuit voltage appearing at the output terminals is vTh gm vg rp  vg where   gm rp is the ampli cation factor. Proper series arrangement of vTh and RTh gives the circuit of Fig. 7-9(b).
For the ampli er of Example 7.6, (a) use (7.9) to evaluate the plate resistance and (7.10) to nd the transconductance.
a rp % vP 218 152 10 k iP vG 4 14:7 8:1 10 3
(b) use
gm %
iP 14:7 8:1 10 3 1:65 mS vG vP 186 2 6
SMALL-SIGNAL MIDFREQUENCY FET AND TRIODE AMPLIFIERS
[CHAP. 7
Find an expression for the voltage gain Av vp =vg of the basic triode ampli er of Fig. 4-12, using an ac equivalent circuit.
The equivalent circuit of Fig. 7-9(b) is applicable if RL is connected from P to K. division in the plate circuit, vp RL vg R L rp so Av vp RL vg RL rp Then, by voltage
In the ampli er of Problem 4.27, let vS 2 cos !t V. (a) Draw the ac load line on Fig. 4-31. (b) Graphically determine the voltage gain. (c) Calculate the voltage gain using small-signal analysis.
(a) If capacitor CK appears as a short circuit to ac signals, then application of KVL around the plate circuit of Fig. 4-30 gives, as the equation of the ac load line, VPP VGQ iP RL vP . Thus, the ac load line has vertical and horizontal intercepts VPP VGQ 300 4 25:5 mA RL 11:6 103 as shown on Fig. 4-31. (b) We have vg vS ; thus, as vg swings 2 V along the ac load line from the Q point in Fig. 4-31, vp swings a total of 2Vpm 213 145 68 V as shown. The voltage gain is then Av 2Vpm 68 17 2Vgm 4 and VPP VGQ 296 V
where the minus sign is included to account for the phase reversal between vp and vg . (c) Applying (7.9) and (7.10) at the Q point of Fig. 4-31 yields vP 202 168 4:86 k rp iP vG 4 15 8 10 3 i 15:5 6:5 10 3 4:5 mS gm P vG vP 180 3 5 Then,   gm rp 21:87, and Problem 7.21, yields Av RL 21:87 11:6 103 15:41 R L rp 11:6 4:86 103
The input admittance to a triode modeled by the small-signal equivalent circuit of Fig. 7-9(b) is obviously zero; however, there are interelectrode capacitances that must be considered for highfrequency operation. Add these interelectrode capacitances (grid-cathode capacitance Cgk ; plategrid, Cpg ; and plate-cathode, Cpk ) to the small-signal equivalent circuit of Fig. 7-9(b). Then (a) nd the input admittance Yin , (b) nd the output admittance Yo , and (c) develop a highfrequency model for the triode.
(a) With the interelectrode capacitances in position, the small-signal equivalent circuit is given by Fig. 7-24. The input admittance is Yin IS I I2 1 VS VS VS sCgk VS 1=sCgk VS Vo sCpg VS Vo 1=sCpg 1
Copyright © OnBarcode.com . All rights reserved.