Author(s):
1. Mohd Ziauddin Jahangir:
Department of Electronics and Communications Engineering (ECE),CBIT Hyderabad,India
2. Chandra Sekhar Paidimarry:
Department of Electronics and Communications Engineering (ECE), UCE-Osmania University Hyderabad,,India
Abstract:
In this article, a novel digitally controlled Oscillator (DCO) for All Digital Phase Locked Loop (ADPLL) is presented. In the proposed DCO, the concept of a combinational frequency multiplier is used to double the frequency range of a conventional digital ring oscillator. However, conventional combinational frequency multiplier circuits can produce a 50% duty cycle only for a single input frequency. Hence, a novel circuit for frequency multiplication is proposed that can produce an output frequency equal to 2 times the input frequencies with a 50% duty cycle for all the frequencies. The proposed DCO is developed by integrating a digitally controlled ring oscillator with the proposed novel combinational multiplier. Digitally controlled delay inverters are used to design both the DCRO and the novel combinational frequency multiplier. A 5-bit DCO is realized using a 4-bit DCRO and the proposed combinational frequency multiplier in 90nm CMOS technology. The resultant frequency range is verified by simulation.
Page(s):
956-960
DOI:
DOI not available
Published:
Journal: ARPN Journal of Engineering and Applied Sciences, Volume: 18, Issue: 8, Year: 2023
Keywords:
DDS
,
resonant sensors
,
NCO
,
ADPLL
,
FPGAbased DDSADPLL
,
FPGA Type1 ADPLL
References:
References are not available for this document.
Citations
Citations are not available for this document.