Title :
A fast CMOS voltage-controlled ring oscillator
Author :
Savaria, Yvon ; Chtchvyrkov, Dmitri ; Currie, John F.
Author_Institution :
Electr. Eng. Dept., Ecole Polytech., Montreal, Que., Canada
fDate :
30 May-2 Jun 1994
Abstract :
A voltage-controlled ring oscillator based on variable capacitive loading is described. A prototype, fabricated in a 1.2 μm CMOS-technology, has been tested. The results showed that it is capable to operate at a maximum frequency of 560 MHz. This design operates at 92% of the speed achievable by the same ring oscillator, but where the speed control circuits have been removed. An important feature of this oscillator is its tunability range, which goes from 277 to 560 MHz, or a factor of 2.0 between fmax and fmin. This paper presents the simulations performed to optimize the performance of the circuit
Keywords :
CMOS analogue integrated circuits; circuit tuning; voltage-controlled oscillators; 1.2 micron; 277 to 560 MHz; fast CMOS ring VCO; high-speed operation; tunability range; variable capacitive loading; voltage-controlled ring oscillator; Added delay; CMOS technology; Circuits; Clocks; Frequency synchronization; MOS devices; Phase locked loops; Prototypes; Ring oscillators; Voltage-controlled oscillators;
Conference_Titel :
Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-1915-X
DOI :
10.1109/ISCAS.1994.409271
