Title :
An infinite phase shift delay-locked loop with voltage-controlled sawtooth delay line
Author :
Chen, Chao-Chyun ; Liu, Shen-Iuan
Author_Institution :
Nat. Taiwan Univ., Taipei
Abstract :
A wide-range delay-locked loop (DLL) with infinite phase shift and duty cycle control is presented. A voltage-controlled sawtooth delay line provides not only the delay control but also duty cycle control. The proposed DLL achieves infinite phase shift by using a single loop. Therefore, it has the benefits of good jitter and wide range compared with the conventional dual-loop DLL. The proposed DLL has been fabricated in a 0.18-mum CMOS process and the core area is 0.45 times 0.3 mm2. The measurement results show the proposed DLL operates from 50 MHz to 500 MHz. The duty cycle of the output clock can be adjusted from 30% to 60% in the step of 5%. At 500 MHz, the measured peak-to-peak jitter is 11.1 ps and the power consumption is 6 mW.
Keywords :
CMOS integrated circuits; delay lines; delay lock loops; low-power electronics; phase shifters; power consumption; CMOS process; delay-locked loop; duty cycle control; frequency 50 MHz to 500 MHz; infinite phase shift; power 6 mW; power consumption; size 0.18 mum; voltage-controlled sawtooth delay line; CMOS process; Chaos; Clocks; Counting circuits; Delay lines; Jitter; Power measurement; Pulse generation; Solid state circuits; Voltage control;
Conference_Titel :
Solid-State Circuits Conference, 2007. ASSCC '07. IEEE Asian
Conference_Location :
Jeju
Print_ISBN :
978-1-4244-1359-1
Electronic_ISBN :
978-1-4244-1360-7
DOI :
10.1109/ASSCC.2007.4425727
