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.

Reference Hertz (Hz)

Required number input.

Reference Divider

Required integer input.

Frequency increment for an integer-N PLL synthesizer after reference divider R. 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]

Step Hertz (Hz)

The resulting step hertz returned as a number.

• Oscillator estimates use nominal component values and simplified resonator models. Load capacitance, parasitics, drive level, startup margin, phase noise, temperature, aging, pulling, and amplifier nonlinearities determine the realized frequency and stability.
• 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.

• PLL Loop Bandwidth

  Compute the phase-detector comparison frequency that sets the PLL loop bandwidth from the reference frequency, loop divider, and a documented reference divider (default ten).

• PLL Output Frequency

  Compute the output frequency of a phase-locked loop from the reference frequency and divider ratios.

• Direct Digital Synthesis Frequency

  DDS output frequency from an integer tuning word, system clock and phase accumulator bit width.