1. What is Voltage Gain?

Voltage gain is a measure of the amplification of an amplifier or electronic system. It is the ratio of the output voltage to the input voltage, typically expressed as a dimensionless quantity or in decibels (dB).

2. How Does the Calculator Work?

The calculator uses the voltage gain equation:

Where:

• \( V_{out} \) — Output voltage (volts)
• \( V_{in} \) — Input voltage (volts)

Explanation: The equation calculates how much an amplifier increases the voltage level from input to output.

3. Importance of Voltage Gain Calculation

Details: Voltage gain is fundamental in electronics design, helping engineers determine amplifier performance, signal strength requirements, and system behavior.

4. Using the Calculator

Tips: Enter both output and input voltages in volts. All values must be positive numbers. The result is a dimensionless ratio.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical voltage gain value?
A: Gain values vary widely. Values >1 indicate amplification, =1 is unity gain, and <1 indicates attenuation.

Q2: How is voltage gain different from power gain?
A: Voltage gain measures voltage ratio, while power gain measures power ratio (which depends on both voltage and current).

Q3: Can voltage gain be negative?
A: Yes, negative gain indicates phase inversion (180° phase shift), but this calculator shows absolute value.

Q4: How do I convert gain to decibels?
A: Gain(dB) = 20 × log₁₀(voltage gain). A gain of 10 equals 20 dB.

Q5: Does gain change with frequency?
A: Yes, most amplifiers have frequency-dependent gain (see frequency response curves).