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Statements

Subject Item
dbr:Open-circuit_time_constant_method
rdf:type
dbo:TopicalConcept
rdfs:label
Open-circuit time constant method
rdfs:comment
The open-circuit time constant (OCT) method is an approximate analysis technique used in electronic circuit design to determine the corner frequency of complex circuits. It is a special case of technique when reactive elements consist of only capacitors. The zero-value time (ZVT) constant method itself is a special case of the general Time- and Transfer Constant (TTC) analysis that allows full evaluation of the zeros and poles of any lumped LTI systems of with both inductors and capacitors as reactive elements using time constants and transfer constants. The OCT method provides a quick evaluation, and identifies the largest contributions to time constants as a guide to the circuit improvements.
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n13:Open-circuit_time_constant.png n13:Open_Circuit_Time_Constant_Estimates.png
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dbc:Electronic_design dbc:Electronic_engineering
dbo:wikiPageID
15444460
dbo:wikiPageRevisionID
1026521701
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dbr:Pole_splitting dbr:Step_response dbc:Electronic_engineering n7:Open_Circuit_Time_Constant_Estimates.PNG dbr:Transfer_function dbr:Transfer_constant dbr:Corner_frequency dbc:Electronic_design n7:Open-circuit_time_constant.PNG dbr:Complex_circuit dbr:Zero-value_time_constant_(ZVT)_method dbr:General_Time-_and_Transfer_Constant_(TTC)_analysis dbr:Kirchhoff's_circuit_laws dbr:Time_constant
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n13:Open-circuit_time_constant.png?width=300
dbo:abstract
The open-circuit time constant (OCT) method is an approximate analysis technique used in electronic circuit design to determine the corner frequency of complex circuits. It is a special case of technique when reactive elements consist of only capacitors. The zero-value time (ZVT) constant method itself is a special case of the general Time- and Transfer Constant (TTC) analysis that allows full evaluation of the zeros and poles of any lumped LTI systems of with both inductors and capacitors as reactive elements using time constants and transfer constants. The OCT method provides a quick evaluation, and identifies the largest contributions to time constants as a guide to the circuit improvements. The basis of the method is the approximation that the corner frequency of the amplifier is determined by the term in the denominator of its transfer function that is linear in frequency. This approximation can be extremely inaccurate in some cases where a zero in the numerator is near in frequency. The method also uses a simplified method for finding the term linear in frequency based upon summing the RC-products for each capacitor in the circuit, where the resistor R for a selected capacitor is the resistance found by inserting a test source at its site and setting all other capacitors to zero. Hence the name zero-value time constant technique.
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dbr:Technique
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wikipedia-en:Open-circuit_time_constant_method?oldid=1026521701&ns=0
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wikipedia-en:Open-circuit_time_constant_method