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Critical Voltage is the minimum phase to the neutral voltage which glows and appears all along the line conductor. It represents the threshold voltage required for proper transistor operation in electronic circuits.
The calculator uses the voltage division formula:
Where:
Explanation: This formula calculates the voltage division between the input amplifier resistance and equivalent source resistance to determine the critical gate-to-source voltage.
Details: Accurate critical voltage calculation is crucial for proper transistor biasing, ensuring optimal amplifier performance, and preventing circuit malfunction in electronic devices.
Tips: Enter input amplifier resistance and equivalent source resistance in Ohms, input voltage in Volts. All values must be positive numbers for accurate calculation.
Q1: What is the significance of critical voltage in transistor circuits?
A: Critical voltage determines the minimum voltage required for the transistor to operate in its active region, affecting amplification and switching characteristics.
Q2: How does source resistance affect the critical voltage?
A: Higher equivalent source resistance reduces the critical voltage due to increased voltage division, while lower source resistance allows more voltage to reach the gate.
Q3: What are typical values for input amplifier resistance?
A: Input amplifier resistance typically ranges from hundreds of Ohms to several Megaohms, depending on the amplifier design and application.
Q4: Can this calculator be used for both MOSFET and BJT transistors?
A: While the voltage division principle applies to both, specific threshold voltages and operating characteristics differ between MOSFET and BJT technologies.
Q5: What happens if the input voltage is below the critical voltage?
A: If the input voltage falls below the critical voltage, the transistor may not turn on properly, leading to poor amplification or complete circuit failure.