1 results about "Charge pumping" patented technology

This invention discloses a fractional phase-locked loop (PLL) based on multi-path quantization noise compensation. It introduces a data synchronization circuit based on the falling edge of the reference clock, ensuring that the divider signals of all paths have reached steady state before the phase detector is triggered by the next rising edge of the PFD, thus completely eliminating dynamic timing interference in the mixed-signal path. By introducing a multi-path retimer with a sign bit, the compensable quantization noise range is expanded. The current-DAC type charge pump proposed in this invention adopts a charge pump architecture based on a source switch array and a static discharge current. The source switch array utilizes the low impedance characteristics of the source nodes of the current source transistors, significantly improving the switching speed and reducing the settling time. The static discharge current forces the loop to maintain a fixed non-zero phase offset in the locked state, permanently shifting the charge pump operating point out of the nonlinear region and deeply suppressing fractional spurious emissions.