0 A Novel Simple Current-mode Square/Triangular Wave Generator with Independently-Linearly Controllable Frequency and Amplitudes

In this paper, a current-mode square/triangular wave is presented. Due to operation in current-mode, the proposed circuit provides a wide frequency response, a low supply voltage, low power consumption and electronic controllability. Thus, it is very suitable for use in portable and battery-powered equipments. The proposed square/triangular wave generator consists of merely current mode Schmitt trigger and current mode integrator with current squarer, which can be fabricated into Integrated Circuit (IC) form through a CMOS technology. The features of the proposed circuit is that it can provide simultaneously both a square wave and a triangular wave whose frequency and amplitudes can be independently controlled by input bias currents. The performances of the proposed circuit are explored through HSPICE simulation program using BSIM3v3 parameters of AMIS 0.5μm, they demonstrate good agreement to the theoretical anticipation. The proposed circuit works at as low as ±1V supply voltages; power consumption is merely 10.9µW