Time Period for UJT as Oscillator Thyristor Firing Circuit Solution

STEP 0: Pre-Calculation Summary
Formula Used
Time Period of UJT as Oscillator = Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio))
TUJT(osc) = Rstb*C*ln(1/(1-η))
This formula uses 1 Functions, 4 Variables
Functions Used
ln - The natural logarithm, also known as the logarithm to the base e, is the inverse function of the natural exponential function., ln(Number)
Variables Used
Time Period of UJT as Oscillator - (Measured in Second) - Time period of UJT as Oscillator is the time taken by the UJT oscillator to make one complete oscillation.
Stablizing Resistance - (Measured in Ohm) - Stablizing Resistance is defined as the opposition faced by the flow of current through a thyristor based circuit which is used to stablize.
Capacitance - (Measured in Farad) - Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential for any thyristor circuit.
Intrinsic Stand-off Ratio - Intrinsic stand-off ratio UJT as Oscillator is defined as the ratio of emitter base 1 resistance to the total emitter base junctions resistances.
STEP 1: Convert Input(s) to Base Unit
Stablizing Resistance: 32 Ohm --> 32 Ohm No Conversion Required
Capacitance: 0.3 Farad --> 0.3 Farad No Conversion Required
Intrinsic Stand-off Ratio: 0.529 --> No Conversion Required
STEP 2: Evaluate Formula
Substituting Input Values in Formula
TUJT(osc) = Rstb*C*ln(1/(1-η)) --> 32*0.3*ln(1/(1-0.529))
Evaluating ... ...
TUJT(osc) = 7.22781297567091
STEP 3: Convert Result to Output's Unit
7.22781297567091 Second --> No Conversion Required
FINAL ANSWER
7.22781297567091 7.227813 Second <-- Time Period of UJT as Oscillator
(Calculation completed in 00.004 seconds)

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Chandigarh University (CU), Punjab
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10+ SCR Firing Circuit Calculators

Thyristor Firing Angle for RC Firing Circuit
Go Firing Angle = asin(Gate Threshold Voltage*((Stablizing Resistance+Variable Resistance+Thyristor Resistance)/(Peak Input Voltage*Stablizing Resistance)))
Peak Thyristor Gate Voltage for Resistance Firing Circuit
Go Maximum Gate Voltage = (Peak Input Voltage*Stablizing Resistance)/(Variable Resistance+Thyristor Resistance+Stablizing Resistance)
Firing Angle of UJT as Oscillator Thyristor Firing Circuit
Go Firing Angle = Angular Frequency*Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio))
Time Period for UJT as Oscillator Thyristor Firing Circuit
Go Time Period of UJT as Oscillator = Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio))
Peak Thyristor Gate Voltage for RC Firing Circuit
Go Maximum Gate Voltage = Gate Threshold Voltage/(sin(Angular Frequency*Time Period of Progressive Wave))
Emitter Current for UJT based Thyristor Firing Circuit
Go Emitter Current = (Emitter Voltage-Diode Voltage)/(Emitter Resistance Base 1+Emitter Resistance)
Frequency of UJT as Oscillator Thyristor Firing Circuit
Go Frequency = 1/(Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio)))
Intrinsic Stand-off Ratio for UJT based Thyristor Firing Circuit
Go Intrinsic Stand-off Ratio = Emitter Resistance Base 1/(Emitter Resistance Base 1+Emitter Resistance Base 2)
Discharging Current of dv-dt Protection Thyristor Circuits
Go Discharging Current = Input Voltage/((Resistance 1+Resistance 2))
Emitter Voltage to Turn On UJT based Thyristor Firing Circuit
Go Emitter Voltage = Emitter Resistance Base 1 Voltage+Diode Voltage

16 SCR Characteristics Calculators

Worst Case Steady State Voltage across First Thyristor in Series Connected Thyristors
Go Worst Case Steady State Voltage = (Resultant Series Voltage of Thyristor String+Stablizing Resistance*(Number of Thyristors in Series-1)*Off State Current Spread)/Number of Thyristors in Series
Thyristor Commutation Voltage for Class B Commutation
Go Thyristor Commutation Voltage = Input Voltage*cos(Angular Frequency*(Thyristor Reverse Bias Time-Auxiliary Thyristor Reverse Bias Time))
Derating Factor of Series Connected Thyristor String
Go Derating Factor of Thyristor String = 1-Resultant Series Voltage of Thyristor String/(Worst Case Steady State Voltage*Number of Thyristors in Series)
Time Period for UJT as Oscillator Thyristor Firing Circuit
Go Time Period of UJT as Oscillator = Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio))
Emitter Current for UJT based Thyristor Firing Circuit
Go Emitter Current = (Emitter Voltage-Diode Voltage)/(Emitter Resistance Base 1+Emitter Resistance)
Circuit Turn off Time Class B Commutation
Go Circuit Turn Off Time Class B Commutation = Thyristor Commutation Capacitance*Thyristor Commutation Voltage/Load Current
Frequency of UJT as Oscillator Thyristor Firing Circuit
Go Frequency = 1/(Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio)))
Thyristor Conduction Time for Class A Commutation
Go Thyristor Conduction Time = pi*sqrt(Inductance*Thyristor Commutation Capacitance)
Peak Current Class B Thyristor Commutation
Go Peak Current = Input Voltage*sqrt(Thyristor Commutation Capacitance/Inductance)
Intrinsic Stand-off Ratio for UJT based Thyristor Firing Circuit
Go Intrinsic Stand-off Ratio = Emitter Resistance Base 1/(Emitter Resistance Base 1+Emitter Resistance Base 2)
Circuit Turn off Time Class C Commutation
Go Circuit Turn Off Time Class C Commutation = Stablizing Resistance*Thyristor Commutation Capacitance*ln(2)
Leakage Current of Collector-Base Junction
Go Collector Base Leakage Current = Collector Current-Common-Base Current Gain*Collector Current
Power Dissipated by Heat in SCR
Go Power Dissipated by Heat = (Junction Temperature-Ambient Temperature)/Thermal Resistance
Thermal Resistance of SCR
Go Thermal Resistance = (Junction Temperature-Ambient Temperature)/Power Dissipated by Heat
Discharging Current of dv-dt Protection Thyristor Circuits
Go Discharging Current = Input Voltage/((Resistance 1+Resistance 2))
Emitter Voltage to Turn On UJT based Thyristor Firing Circuit
Go Emitter Voltage = Emitter Resistance Base 1 Voltage+Diode Voltage

Time Period for UJT as Oscillator Thyristor Firing Circuit Formula

Time Period of UJT as Oscillator = Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio))
TUJT(osc) = Rstb*C*ln(1/(1-η))

What is an UJT relaxation oscillator?

UJT relaxation oscillator is a type of RC ( resistor-capacitor) oscillator where the active element is a UJT (uni-junction transistor). UJT is an excellent switch with switching times in the order of nano seconds. It has a negative resistance region in the characteristics and can be easily employed in relaxation oscillators. The UJT relaxation oscillator is called so because the timing interval is set up by the charging of a capacitor and the timing interval is ceased by the the rapid discharge of the same capacitor.

How to Calculate Time Period for UJT as Oscillator Thyristor Firing Circuit?

Time Period for UJT as Oscillator Thyristor Firing Circuit calculator uses Time Period of UJT as Oscillator = Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio)) to calculate the Time Period of UJT as Oscillator, The Time Period for UJT as Oscillator Thyristor Firing Circuit formula is defined as the time taken by the UJT oscillator to make one complete oscillation. Time Period of UJT as Oscillator is denoted by TUJT(osc) symbol.

How to calculate Time Period for UJT as Oscillator Thyristor Firing Circuit using this online calculator? To use this online calculator for Time Period for UJT as Oscillator Thyristor Firing Circuit, enter Stablizing Resistance (Rstb), Capacitance (C) & Intrinsic Stand-off Ratio (η) and hit the calculate button. Here is how the Time Period for UJT as Oscillator Thyristor Firing Circuit calculation can be explained with given input values -> 7.227813 = 32*0.3*ln(1/(1-0.529)).

FAQ

What is Time Period for UJT as Oscillator Thyristor Firing Circuit?
The Time Period for UJT as Oscillator Thyristor Firing Circuit formula is defined as the time taken by the UJT oscillator to make one complete oscillation and is represented as TUJT(osc) = Rstb*C*ln(1/(1-η)) or Time Period of UJT as Oscillator = Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio)). Stablizing Resistance is defined as the opposition faced by the flow of current through a thyristor based circuit which is used to stablize, Capacitance is the ratio of the amount of electric charge stored on a conductor to a difference in electric potential for any thyristor circuit & Intrinsic stand-off ratio UJT as Oscillator is defined as the ratio of emitter base 1 resistance to the total emitter base junctions resistances.
How to calculate Time Period for UJT as Oscillator Thyristor Firing Circuit?
The Time Period for UJT as Oscillator Thyristor Firing Circuit formula is defined as the time taken by the UJT oscillator to make one complete oscillation is calculated using Time Period of UJT as Oscillator = Stablizing Resistance*Capacitance*ln(1/(1-Intrinsic Stand-off Ratio)). To calculate Time Period for UJT as Oscillator Thyristor Firing Circuit, you need Stablizing Resistance (Rstb), Capacitance (C) & Intrinsic Stand-off Ratio (η). With our tool, you need to enter the respective value for Stablizing Resistance, Capacitance & Intrinsic Stand-off Ratio and hit the calculate button. You can also select the units (if any) for Input(s) and the Output as well.
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