Sinusoidal Oscillator Realizations Using Other Types of Current Conveyors - Current Conveyors: Variants, Applications and Hardware Implementations - page 443

z− I 01

y 1

y 1 z−

DDCCC

y 2

DDCCC

C 2

y 2
y 3

I 02

y 3

x z+

z+

x

R 1

C 1

R 2

R 3

Fig. 13.4 SRCO using two DDCCCs proposed by Gupta and Senani [ 9 ]

13.6 Grounded-Capacitor Current-Mode SRCO Using
a Single DVCCC

There has been considerable interest in involving SRCO employing both grounded
capacitors which is known to be an attractive feature from the view point of IC
Implementation as well as ease of eliminating/accommodating various parasitic
capacitances of the active elements. With this motivation in mind, GC-based
SRCOs have been attempted using almost every kind of active building block.
Among these, the circuits which employ only a single active element are of
particular interest because of reason of reduced power consumption, low compo-
nent count and also the theoretical novelty from various considerations. A
GC-SRCO which provides an explicit current output while providing the following
other advantageous features: (i) use of only a single active building block
(ii) employment of only two GCs and no more than three resistors (iii) provision
of non-interacting control of frequency of oscillation (FO) as well as condition of
oscillation (CO) and (iv) availability of a simple CO and unconstraint tuning law for
the FO.
Although there have been several oscillators using DVCCs such as [ 13 , 17 ], a
circuit possessing all the above mentioned desirable properties, while using a single
differential voltage complimentary current conveyor (DVCCC), was first proposed
by Gupta and Senani in [ 7 ] and is shown here in Fig. 13.5 .
The CO and FO for this circuit are given by:

C 2
C 1 þ

CO R 1 R 3 ð 13 : 12 Þ

:

C 2