%0 Journal Article
%T Current and Voltage Mode Multiphase Sinusoidal Oscillators Using CBTAs
%A M. Sagbas
%A U. E. Ayten
%A N. Herencsar
%A S. Minaei
%J Radioengineering
%D 2013
%I Spolecnost pro radioelektronicke inzenyrstvi
%X Current-mode (CM) and voltage-mode (VM) multiphase sinusoidal oscillator (MSO) structures using current backward transconductance amplifier (CBTA) are proposed. The proposed oscillators can generate n current or voltage signals (n being even or odd) equally spaced in phase. n+1 CBTAs, n grounded capacitors and a grounded resistor are used for nth-state oscillator. The oscillation frequency can be independently controlled through transconductance (gm) of the CBTAs which are adjustable via their bias currents. The effects caused by the non-ideality of the CBTA on the oscillation frequency and condition have been analyzed. The performance of the proposed circuits is demonstrated on third-stage and fifth-stage MSOs by using PSPICE simulations based on the 0.25 ¦Ìm TSMC level-7 CMOS technology parameters.
%K Multiphase sinusoidal oscillator
%K current backward transconductance amplifier (CBTA)
%K current-mode circuits
%K voltage-mode circuits
%K active networks
%U www.radioeng.cz/fulltexts/2013/13_01_0024_0033.pdf