Quadrature Oscillator Using DDCCs

Abstract

A new voltage-mode quadrature oscillator using two differential difference current conveyors (DDCCs).

two grounded capacitors and two grounded res1stors is presented, in this paper. The proposed circuit

provides two output voltage sources with 90° phase difference. The oscillation frequency and oscillation

condition are orthogonally controlled. The proposed circuit employs only grounded capacitors and resistors,

which is ideal for integrated circuit implementation. Also, the proposed structure is eminently suitable

fabrication both in CMOS and bipolar technologies. The theoretical results are verified by PSPICE simulation

In addition, the proposed oscillator can be easily expanded to four output voltage sources with 90° phase

difference by using additional DDCCs.