Abstract
This paper aims at presenting three voltage mode square wave generator circuits using single current differencing buffered amplifier (CDBA), a recently proposed mixed mode building block. The first proposed circuit produces a variable frequency output having fixed duty cycle, whereas the rest of the circuits have variable duty cycle. One of the circuits uses passive element adjustment to control the duty cycle, whereas electronic control is used in the other circuit. The workability of the proposed circuits is confirmed through SPICE simulations and experimental work.
Highlights
It is well known that inherent wide bandwidth which is virtually independent of closed loop gain, greater linearity and large dynamic range [1] are the key performance features of current mode technique
The aim of this paper is to present three square wave generator circuits using single CDBA and three to five passive elements
[2RL/RF − 1] − VdcRL/Vs−atRS [1 − VdcRL/Vs−atRS]. These results show that the on and off duty cycles of the output can be controlled with the help of externally applied voltage Vdc
Summary
It is well known that inherent wide bandwidth which is virtually independent of closed loop gain, greater linearity and large dynamic range [1] are the key performance features of current mode technique. The literature review reveals that several triangular/square wave generators using various analog building blocks have already been presented [4,5,6,7,8,9,10,11]. Triangular/square wave generators presented in [5,6,7,8,9,10,11] use current mode building-blocks-based circuits. The study of these circuits reveals that (i) references [5, 6, 10] employ more than one active element;.
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