Title :
A wide tuning range voltage-controlled ring oscillator dedicated to ultrasound transmitter
Author :
Zhao, X. ; Chebli, R. ; Sawan, M.
Author_Institution :
Dept. of Electr. Eng., Ecole Polytech. de Montreal, Que., Canada
Abstract :
In this paper, a new design for a voltage-controlled ring oscillator (VCO) is presented. Implemented in 0.8 μm high-voltage CMOS/DMOS technology provided by DALSA semiconductor with 5 V power supply, this circuit uses relatively devices dimensions and low stages number to operate at low frequency. The new VCO combines three control methods to vary the oscillation frequency. The proposed VCO topology exhibits a very wide tuning range from 13 Hz to 407 MHz with good transient characteristics, which is difficult to get from the conventional VCO. Its power consumption at the maximum oscillation frequency is 29.2 mW.
Keywords :
CMOS integrated circuits; UHF oscillators; VHF oscillators; circuit tuning; integrated circuit design; network topology; power integrated circuits; transmitters; ultrasonic transducers; voltage-controlled oscillators; 0.8 micron; 13 Hz to 407 MHz; 29.2 mW; 5 V; DALSA semiconductor; VCO topology; circuit tuning; high voltage CMOS-DMOS technology; oscillation frequency; power consumption; transient characteristics; ultrasound transmitter; voltage controlled ring oscillator; CMOS technology; Circuit optimization; Circuit topology; Frequency; Power supplies; Ring oscillators; Transmitters; Tuning; Ultrasonic imaging; Voltage-controlled oscillators;
Conference_Titel :
Microelectronics, 2004. ICM 2004 Proceedings. The 16th International Conference on
Print_ISBN :
0-7803-8656-6
DOI :
10.1109/ICM.2004.1434276
