Title :
Current-mode third-order quadrature oscillator using VDTAs and grounded capacitors
Author :
Phatsornsiri, Punnavich ; Lamun, P. ; Kumngern, Montree ; Torteanchai, Usa
Author_Institution :
Fac. of Eng., King Mongkut´s Inst. of Technol. Ladkrabang, Bangkok, Thailand
Abstract :
This paper presents a novel electronically tunable current-mode third-order quadrature oscillator based on voltage differencing transconductance amplifier (VDTA). The proposed oscillator is constructed using two VDTAs and three grounded capacitors, which is advantageous for integrated circuit implementation. The circuit provides two current outputs with 90° phase difference from high output impedance terminals. The condition of oscillation and the frequency of oscillation can be electronically tuned by adjusting the bias current of the VDTAs. The sensitivity studies of the circuit have been carried out. PSPICE simulations with 0.35 μm TSMC CMOS process parameters are given to confirm the theoretical analysis.
Keywords :
CMOS integrated circuits; SPICE; capacitors; circuit tuning; integrated circuit design; operational amplifiers; oscillators; PSPICE simulation; TSMC CMOS process parameter; VDTA; bias current adjustment; current mode third-order quadrature oscillator; electronically oscillation condition tuning; electronically oscillation frequency tuning; grounded capacitor; integrated circuit implementation; size 0.35 mum; voltage differencing transconductance amplifier; CMOS integrated circuits; Capacitors; Integrated circuit modeling; Oscillators; Quality of service; Sensitivity; Transconductance; Voltage Differencing Transconductance Amplifier (VDTA); current-mode circuit; quadrature oscillator;
Conference_Titel :
Information and Communication Technology, Electronic and Electrical Engineering (JICTEE), 2014 4th Joint International Conference on
Conference_Location :
Chiang Rai
Print_ISBN :
978-1-4799-3854-4
DOI :
10.1109/JICTEE.2014.6804103
