Digitally Controlled Delay Lines Using Strobe Controlled Logic

Abstract

In recent years, Digitally Controlled Delay-Lines {DCDLJ Is a key block In number of app/lcattons and play the role of DAC in traditional circuits. This paper presents a totally glitch free DCDL which overcame the limitation of a NANO based DCDL using strobe control method. Using this logic, a clock Is presented, that reduces the output jitter when compared to the existing method. The existing method uses a delay control code and reduces the delay of about 40%, but it consumes more power and less is area efficient. By using strobe controlled logic, the peak to peak absolute output jitter of 70-80% was reduced. As an example application, All-Digital Spread-Spectrum Clock Generator {SSCGJ, All-Digital Phasetocked Loops {ADPLLJ, and Phase-Locked Loop {PLLJ were used.