Title :
A current-controlled oscillator coarse-steering acquisition-aid for high frequency SOI CMOS PLL circuits
Author :
Chang, Yi-Cheng ; Greeneich, Edwin W.
Author_Institution :
Dept. of Electr. Eng., Arizona State Univ., Tempe, AZ, USA
Abstract :
A self-adjusting frequency control circuit for a high-speed phase-locked loop (PLL) system is designed for implementation in a 0.25 μm SOI CMOS technology. This coarse-steering circuit uses a current sensor to indirectly detect the running frequency of the VCO/ICO and combine the result generated from a simple frequency comparator to determine an active frequency control range for the PLL. The entire circuit has been simulated with a wide frequency range of 850 MHz and a power supply voltage of 1.8 volts on HSPICE
Keywords :
CMOS integrated circuits; UHF integrated circuits; automatic frequency control; mixed analogue-digital integrated circuits; phase locked loops; silicon-on-insulator; 0.25 micron; 1.8 V; 850 MHz; HSPICE simulation; SOI CMOS PLL circuits; SOI CMOS technology; VCO/ICO; active frequency control range; coarse-steering acquisition-aid; current sensor; current-controlled oscillator; frequency comparator; high frequency PLL circuits; high-speed PLL system; phase-locked loop; running frequency detection; self-adjusting frequency control circuit; Circuits; Flip-flops; Frequency control; Frequency conversion; Phase frequency detector; Phase locked loops; Registers; Signal generators; Voltage; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 1999. ISCAS '99. Proceedings of the 1999 IEEE International Symposium on
Conference_Location :
Orlando, FL
Print_ISBN :
0-7803-5471-0
DOI :
10.1109/ISCAS.1999.780814
