Variable-precision duty ratio self-adaptive adjustment frequency multiplier applied to phase-locked loop

• Main Authors: MA TAO, JIANG RUIFENG, DENG HUIRONG, SONG YEXI, ZHANG LIANGLIANG, DING CHUAN, WANG BO, ZHANG KE
• Format: Patent
• Language: Chinese; English
• Published: 16.07.2024
• Subjects: AUTOMATIC CONTROL, STARTING, SYNCHRONISATION, OR STABILISATIONOF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES; BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRICITY; GENERATION OF NOISE BY SUCH CIRCUITS; GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING,BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN ANON-SWITCHING MANNER; PULSE TECHNIQUE

The invention discloses a variable-precision duty ratio self-adaptive adjustment frequency multiplier applied to a phase-locked loop. The variable-precision duty ratio self-adaptive adjustment frequency multiplier comprises a precision-adjustable duty ratio detection module, a duty ratio control module and a duty ratio control word decoding module. The duty ratio detection module is composed of a 256-bit time-to-digital converter and a frequency multiplication module. The TDC adopts a traditional assembly line structure. The frequency multiplication module is realized by a simple exclusive-OR gate; the duty ratio control module is composed of multiple stages of phase inverters, each stage of phase inverter is composed of a fast/slow PMOS (P-channel Metal Oxide Semiconductor) and a fast/slow NMOS (N-channel Metal Oxide Semiconductor), and the purpose of duty ratio control is achieved by controlling the combination mode of different fast/slow phase inverters to adjust signal edges. The duty ratio control decode