Use this electronics calculation for a first-pass component, converter, signal, motor, or sensor estimate when the stated operating conditions and units match the device data.

Input Rms Volts (V)

Required number input.

Output Rms Volts (V)

Required number input.

Voltage gain in decibels from output and input RMS amplitudes at a given gain-control setting. The tool evaluates the supplied inputs together and returns the named outputs below; it does not infer omitted operating conditions or change the units shown.^[1]

Gain Decibels (dB)

The resulting gain decibels returned as a number.

• Amplifier gain and rejection calculations are small-signal approximations unless the operating point is checked. Gain-bandwidth, slew rate, input and output range, stability, noise, offset, bias current, loading, and frequency-dependent CMRR can limit the result.
• Use finite inputs in the displayed units and preserve more precision than the final presentation requires. Independently verify safety-critical, financial, compliance, or production decisions.

Check the result against the current datasheet and worst-case operating corners, then verify the circuit or measurement with simulation and bench testing where failure matters.

• Programmable Gain Amplifier Gain

  Linear voltage gain at a selected programmable-amplifier setting from measured input and output amplitude.

• Chopper Amplifier Offset

  Input-referred residual DC offset of a chopper amplifier from its zero-input output offset and closed-loop voltage gain.

• Current Shunt Amplifier Gain

  Voltage gain of a current-shunt amplifier from output swing and measured shunt input swing.