Hardware Reference
In-Depth Information
Chapter 13
Sinusoidal Oscillator Realizations
Using Other Types of Current Conveyors
Abstract A variety of SRCOs realized with numerous types of CCs introduced in
the literature (such as OFC, MOCCII, DDCCCII, DVCC, DVCCC, ICCII,
DVCCCA and FDCCII) have been discussed. The main focus has been on includ-
ing some representative circuit configurations (from amongst a large number of
oscillator circuits reported in literature) which possess some specific attractive
features of practical interest.
13.1
Introduction
In Chap.
7
of this monograph, we presented a number of novel circuits for realizing
single-element-controlled oscillators exhibiting a number of desirable features. The
circuits proposed therein are all practically realizable using commercially available
current conveyors using IC-AD844, using IC op-amps uA741/LF356 in conjunc-
tion with transistor arrays CA3096 or using IC OPA660/860. In spite of an
abundance of CC-based SRCOs based upon the
basic
types of three-terminal CCs
(namely, CCI
), many researchers throughout the world have still
toiled with the idea of devising SRCOs using other variants of CCs not commer-
cially available yet, for instance, see references [
1
-
52
] and the references cited
therein. The basic motivation and inspiration for doing has been a number of
interesting features which can be obtained using the newly emerging variants of
CCs which somehow are not attainable with oscillators using the normal types
of CCs.
The purpose of this chapter is to present some selected sinusoidal oscillator
topologies which use these extended or generalized new varieties of current con-
veyors. It may be noted that although some of the circuits described herein may also
be implemented with AD844 (using several of them) however, the real potential of
these circuits will be realized only when they are fully integrated in bipolar and/or
CMOS technology, because it has been shown elsewhere in this monograph that all
extended and generalized forms of current conveyors can be implemented in
bipolar or CMOS technology.
and CCII
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