A novel time-to-digital converter (TDC) used as a phase/frequency detector and charge
pump replacement in an all-digital PLL within a digital radio processor. The TDC core is …

CLOCK CIRCUITKV the phases of the multiphase oscillator to form the bits of the digital
signal. The sampler, ramp generator, and comparator can be constructed from multiple …

(57) ABSTRACT A digital frequency detector and a digital phase locked loop (PLL) are
provided. The digital frequency detector includes a first conversion unit which outputs a first …

New generations of CMOS IC processes provide faster transistors with greater circuit
density; however, many tradi tional analog characteristics are sacrificed. Consequently, cir …

A clock generating circuit includes: a counter that counts a number of pulses of an oscillation
clock signal existed within one cycle of a reference clock signal; a first time-to-digital …

US7304510B2 - Digital phase detector improving phase detection resolution thereof - Google
Patents US7304510B2 - Digital phase detector improving phase detection resolution thereof …

This application claims the benefit of US provisional application No. 60/658,768 entitled
“Differential Delay-line A/D Converter and Applications” and filed by Dragan Maksimovic et …

This disclosure is generally related to wireless communi cations, and more particularly, to
techniques for noise reduc tion for frequency synthesizers, such as delta-sigma noise …

(57) ABSTRACT A digital fractional PLL introduces an accumulated phase offset before the
digital VCO to achieve the fractional part of the division ratio. To provide this phase offset …

A method and system for filter calibration using fractional-N frequency synthesized signals
are presented. The method may include generating an Local Oscillator (LO) signal by a …