Resistorless dual-mode quadrature sinusoidal oscillator using a single active building block

作者：Jaikla Winai; Siripruchyanun Montree; Lahiri Abhirup^*

来源：Microelectronics Journal, 2011, 42(1): 135-140.

DOI：10.1016/j.mejo.2010.08.017

• Active C circuits
• Quadrature sinusoidal oscillator
• Resistoriess
• Differential voltage current-controlled conveyor transconductance amplifier (DVCCCTA)

This paper presents a new realization of resistorless mixed-mode (i.e. both voltage-mode and current-mode) quadrature sinusoidal oscillator using a new active building block (ABB) called the differential voltage current-controlled conveyor transconductance amplifier (DVCCCTA). The proposed oscillator circuit uses a single DVCCCTA, two grounded capacitors (GCs) and does not employ any external linear resistors. The tuning laws for the condition of oscillation (CO) and the frequency of oscillation (FO) are non-interactive; and controlled by separate bias currents. The circuit provides two explicit quadrature current outputs and two quadrature voltage outputs and thus can be classified as a mixed-mode quadrature oscillator. Another notable feature of the proposed circuit is that it can also be used as a biquadratic filter to realize low-pass and band-pass filtering functions simultaneously. Non-ideal analysis of the circuit is provided and PSpice simulation results have been included to verify the workability of the proposed circuit.

• 出版日期2011-1