Title :
Current-mode four-phase quadrature oscillator using a MCCCCTA and grounded capacitors
Author :
Khaw-ngam, Khachen ; Lamun, Panit ; Kumngern, Montree ; Phasukkit, Pattarapong ; Dejhan, Kobchai
Author_Institution :
Fac. of Eng., King Mongkut´´s Inst. of Technol. Ladkrabang, Bangkok, Thailand
Abstract :
A new current-mode four-phase quadrature oscillator circuit using a single modified current controlled current conveyor transconductance amplifier (MCCCCTA) and two grounded capacitors is presented. The oscillator provides four current outputs with 90° phase difference from high output impedance terminals. The condition of oscillation and the frequency of oscillation can be electronically and orthogonally tuned by adjusting bias currents of MCCCCTA. Non-ideal analysis and sensitivity study of the circuit are carried out. The results of circuit simulations are fully in agreement with the theoretical.
Keywords :
capacitors; current conveyors; current-mode circuits; operational amplifiers; oscillators; MCCCCTA; bias currents; circuit simulation; current-mode four-phase quadrature oscillator circuit; electronic tuning; grounded capacitors; impedance terminal; nonideal analysis; orthogonal tuning; oscillation frequency; single-modified current controlled current conveyor transconductance amplifier; CMOS integrated circuits; Capacitors; MOSFETs; Oscillators; Resistors; Sensitivity; Transconductance; MCCCCTA; current-mode; quadrature oscillator;
Conference_Titel :
Electrical Engineering/Electronics, Computer, Telecommunications and Information Technology (ECTI-CON), 2012 9th International Conference on
Conference_Location :
Phetchaburi
Print_ISBN :
978-1-4673-2026-9
DOI :
10.1109/ECTICon.2012.6254288
