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.

Total Budget (s) (s)

Required number input.

Used RMS (s) (s)

Required number input.

Find the remaining independent random-jitter RMS allowance by subtracting used RMS jitter in quadrature from a total RMS budget. 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]

Remaining RMS (s) (s)

The resulting remaining rms (s) returned as a number.

• Signal-integrity estimates depend on edge rate, channel loss, impedance discontinuities, termination, encoding, equalization, clock recovery, jitter decomposition, crosstalk, connectors, vias, and receiver masks. Aggregate budgets must use compatible statistical or worst-case conventions.
• 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.

• FPGA Clock Jitter Allowance

  Calculate remaining setup-time budget for combined clock jitter after clock period, clock-to-output, combinational path delay, setup time, and skew. Use worst-case values in the same time unit.

• USB Eye Jitter Budget

  Subtract a required open-eye width and other timing penalties from one unit interval to obtain remaining total jitter budget. All inputs are in picoseconds; apply the limits from the relevant USB generation and test specification.

• 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.