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.

Single-sideband noise density (W/Hz)

Required number input.

Carrier power (W)

Required number input.

Express single-sideband noise power spectral density relative to carrier power at a specified offset, in dBc/Hz. 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]

Phase noise at offset (dBc/Hz)

The resulting phase noise at offset returned as a number.

• PLL bandwidth, margin, lock time, output frequency, spur, and integrated-jitter estimates depend on loop order, charge pump, divider values, oscillator gain, reference noise, nonlinear acquisition, and the exact phase-noise integration limits. Simplified linear models primarily describe locked small-signal behavior.
• 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.

• Phase Noise Integrated Jitter Simple

  Convert integrated single-sideband phase-noise power to RMS timing jitter with sqrt(2A)/(2πfcarrier); A is the dimensionless linear noise-to-carrier integral over the chosen offset band.

• ADC Total Harmonic Distortion

  Calculate THD from RMS harmonic amplitudes relative to the fundamental: sqrt(sum of harmonic squares)/fundamental. Output is percent and dBc; include only the harmonics specified by the measurement method, excluding noise and DC.

• Detector Noise Equivalent Power

  Detector noise-equivalent optical power for 1 Hz bandwidth from input-referred current-noise density and responsivity.