Title :
Pulsewidth Modulation Circuits Using CMOS OTAs
Author :
Kim, Hoon ; Kim, Hee-Jun ; Chung, Won-Sup
Author_Institution :
Hanyang Univ., Ansan
Abstract :
This paper presents three pulsewidth modulation modulators using CMOS operational transconductance amplifiers. They consist of a ramp integrator and current-tunable Schmitt triggers. Prototype circuits built using discrete components exhibited that their duty cycles are linearly controllable. Because of their simple structure, the proposed modulators can be easily fabricated in a monolithic integrated circuit.
Keywords :
CMOS analogue integrated circuits; modulators; operational amplifiers; pulse width modulation; trigger circuits; CMOS OTA; CMOS operational transconductance amplifiers; current-tunable Schmitt triggers; discrete components; monolithic integrated circuit; prototype circuits; pulsewidth modulation circuits; pulsewidth modulation modulators; ramp integrator; Feedback circuits; Operational amplifiers; Pulse amplifiers; Pulse circuits; Pulse modulation; Pulse width modulation; Space vector pulse width modulation; Temperature; Threshold voltage; Trigger circuits; Analog integrated circuits; operational transconductance amplifiers (OTAs); pulsewidth modulation (PWM);
Journal_Title :
Circuits and Systems I: Regular Papers, IEEE Transactions on
DOI :
10.1109/TCSI.2007.904677
