Current and Voltage Mode Multiphase Sinusoidal Oscillators Using CBTAs

Sagbas M., Ayten U. E., Herencsar N., Minaei S.

RADIOENGINEERING, vol.22, pp.24-33, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 22
  • Publication Date: 2013
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.24-33
  • Keywords: Multiphase sinusoidal oscillator, current backward transconductance amplifier (CBTA), current-mode circuits, voltage-mode circuits, active networks, FILTERS
  • Yıldız Technical University Affiliated: Yes


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 capacitor and a grounded resistor are used for nth-state oscillator. The oscillation frequency can be independently controlled through transconductance (g) 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 mu m TSMC level-7 CMOS technology parameters.