A Novel Application of FM-ADC Toward the Self-Calibration of Phase-Locked Loops

This paper presents a charge pump-phase locked loop (CP-PLL) that utilizes a frequency-modulated analog-to-digital converter (FM-ADC) as part of a calibration circuit to compensate for process variations and intemperate operating environments. The calibration circuitry first detects the shift in operating conditions, and then dynamically adjusts the loop bandwidth back to its nominal range to guar...