Inverted triode amplifiers

99 Pages·2016·2.35 MB·English

Iowa State University Capstones, Theses and
Retrospective Theses and Dissertations
Dissertations
1952
Inverted triode amplifiers
Glen Arthur Richardson
Iowa State College
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Part of theElectrical and Electronics Commons
Recommended Citation
Richardson, Glen Arthur, "Inverted triode amplifiers " (1952).Retrospective Theses and Dissertations. 13298.
https://lib.dr.iastate.edu/rtd/13298
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INVERTED TRIODE AMPLIFIERS
by
Olen A* Richardson
A Dissertation Submitted to the
Graduate Paoulty in Partial Fulfillment of
The Requirements for the Degree of
DOCTOR OP FHILOSOPffif
Major Subject I Electrical Engineering
Approved*
Signature was redacted for privacy.
In caiarg% of Major Work . ....
.. . •
• •• •
Signature was redacted for privacy.
Heai^ C".-";. •'"A :.•••
••
•* • • •• ^
Signature was redacted for privacy.
* • « • • « »
Dean of Graduate College
Iowa State College
1952
UMI Number: DP12416
(S)
UMI
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TABLE OP CONTEHTS
Page
I. IHTRODUCTION 1
II, REVIEW OP LITERATURE 3
III. INVESTIGATION 7
A* General Scope of Investigation 7
B, Mathematical Analysis 8
1. Equivalent circuits for on inverted
triode 8
2« Gain^ input admittance^ and output
admittance 14
3* Equipotentlal lines 26
C* Ksqperimental Data 27
1« Grid dissipation 27
2. Inverted static characteristic curves 32
3. Inverted-tube parameters 41
4* Gain and distortion 50
IV. DISCUSSION 56
A. Gain, Input Admittance, and Output Ad­
mittance 56
1. Comparison of inverted and conven­
tional amplifiers 56
2. Typical numerical values 60
B. Minima and Maxima of Characteristic Ciirves 64
1. Contours of gn « 0 and/4n *0 64
2. Reasons for minima and maxima 66
0. Equipotentlal Lines 70
D. Oscillations in Inverted Amplifiers 74
E. Future Investigations 75
V. SUMJ^ARY 78
VI. REFERENCES 81
JiOiSS
Ill
LIST OP TABLES
Page
Table 1 Voltage Gain of Inverted Amplifiers 17
Table 2 Input Admittance of Inverted Amplifiers 18
Table 3 Output Admittance of Inverted Amplifiers 19
Table 4 Voltage Gain of Conventional Amplifiers 20
Table 5 Input Admittance of Conventional An^lifiers ••• 21
Table 6 Output Admittance of Conventional Amplifiers .. 22
Table 7 Plate-input Qrid-output Amplifier. Onin and
Distortion 53
Table 8 Plate-input Cathode-output Amplifier. Qain
and Distortion ....•• 54
Table 9 Cathode-input arid-output Amplifier* Gain and
Distortion 65
Table 10 Calculated Values of Voltage Gain, Shunt
Input Resistance and Capacitance^ Shunt
Output Hesistonce and Capacitoncof and Power
Gain of Inverted Amplifiers 61
iv
LIST OF nCUBES
Page
Figure 1 Series and Parallel A-c Equivalent Circuits
for an Inverted Txdode •.***•••.•••••••••••••• 12
i-igure 2 Plate-input Grid-output Amplifier 16
Figure 3 Plate-input Cathode-output Amplifier 16
Figure 4 Cathode-input Grid-output Amplifier 16
Figure 5 Equipotential Lines in en Inverted Plane-
electrode Trlode 28
Figure 6 Equipotential Lines in an Inverted Plane-
electrode Triode 29
Figure 7 Grid Characteristic Curves of an Inverted 6J5. 34
Figure 8 Inverse Transfer Characteristic Curves of 6J6* 35
Figure 9 Inverse Transfer Characteristic Curves of 6J6
for Small Negative Plate Voltages 56
Figure 10 Grid and Cathode Currents of 6J5 for Small
Negative Plate Voltages 37
figure 11 Inverse Constant-current Curves of 6J5 38
Figure 12 Inverse Constant-current Curves of 6J8 for
Small Negative Plate Voltages 39
figure 13 Inverse Amplification Factor Curves of 6J5 •. 43
Figure 14 Inverse Mutual Conductance Curves of 6J5 •••* 44
Figure 15 Dynaudc Grid Resistance Curves of 6J5 45
Figure 16 Inverse Amplification Factor Curves of 6J5
for Small Negative Plate Voltages 47
Figure 17 Inverse Mutual Conductance Curves of 6J5
for Small Negative Plate Voltages 48
Figure 18 Dynamic Grid Resistance Curves of 6J5 for
Small Negative Plate Voltages 49