Abstract
This paper deals with a very simple functional generator employing single multi-terminal advanced active device, so-called z-copy controlled gain voltage differencing current conveyor (ZC-CG-VDCC). This active element offers various inter-terminal relations and interesting possibilities of multi-parameter electronic control, which are utilized to control resulting application (triangular and square wave generator). Simple pulse width modulator (PWM) based on two ZC-CG-VDCCs is a further application example of presented generator. Verification of expected behavior was performed by simulation based on CMOS model of the ZC-CG-VDCC and also by lab measurement. DOI: http://dx.doi.org/10.5755/j01.eee.21.5.13322
Highlights
Advanced or special active elements [1] are useful in circuit synthesis and design from many substantial reasons
Silapan et al [15] used two multiple-output current controlled current differencing amplifiers (MO-CCCDTAs) which consist of current differencing unit (CDU) [1], [16], [17] and Operational transconductance amplifiers (OTA) subsections
These elements are created by internal subsections in a form of operational transconductance amplifier and voltage buffer (VB) or voltage inverter (VI)
Summary
Advanced or special active elements [1] are useful in circuit synthesis and design from many substantial reasons. The beneficial feature of advanced active elements consists in direct independent electronic control of several parameters included in frame of active device, for example [2]–[5]. Common active elements for circuit design (operational amplifiers for example) realize only one and very simple signal operation (Vout = (V+ – V–).A, where A → ∞) [6], [7] without possibility of electronic control of its parameter(s) in Manuscript received March 9, 2015; accepted June 29, 2015. Research described in this paper was financed by Czech Ministry of Education in frame of National Sustainability Program under grant LO1401. Research described in the paper was supported by Czech Science Foundation projects under No 14-24186P. Beneficial features of advanced active elements can be used in the design of functional generators. Operational transconductance amplifiers (OTA) [1], [8] were the first active elements that were very suitable for design of generators
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