Error protection method, tdc module, ctdc module, and calibration method thereof

Abstract

For decreasing errors within an analog phase-locked loop, an all-digital phase-locked loop (ADPLL) with digital components and digital operations is used. The ADPLL may also be used for direct frequency modulation (DFM). By defining a proportional path gain of an ADPLL by a bandwidth and a reference frequency of the ADPLL, by a TDC gain, a DCO gain, a dividing ratio of a frequency divider, a gain of an amplifier or a combination thereof, the gain of the amplifier may be adjusted so that an optimal loop bandwidth of the ADPLL may be well calibrated. For achieving the aim of entirely digital of the ADPLL, the gains of the TDC and the DCO may be further adjusted in a digital manner.

Description

technical field [0001] The present invention relates to an error prevention method, a time-to-digital converter module, a cyclic time-to-digital converter module, an all-digital phase-locked loop, and a calibration method, and in particular to an error Prevention method, time-to-digital converter module applying the error prevention method, circular time-to-digital converter module, all-digital phase-locked loop including the time-to-digital converter module, and loop for calibrating the all-digital phase-locked loop The gain calibration method, wherein the time-to-digital converter module included in the all-digital phase-locked loop includes a circular time-to-digital converter module. Background technique [0002] A phase-locked loop is an electronic control system used to generate a signal that has a fixed relationship to the phase of a reference signal. The phase-locked loop circuit responds to the frequency and phase of the input signal, and automatically increases or...

AI Technical Summary

Problems solved by technology

[0003] As known to those skilled in the art, because the analog PLL uses analog components and operates in an analog manner, the above-mentioned analog PLL is prone to error, or even error propagation (Errorpropagation)

Images