Second Generation Miscellaneous Linear/Nonlinear Applications of Various Types of Current Conveyors - Current Conveyors: Variants, Applications and Hardware Implementations - page 498

Fig. 15.8 DVCC based
voltage-controlled dual slope
square/triangular wave
generator (Adapted from
[ 12 ] © 2012 Elsevier Ltd.)

a

V B

y 2

+−

y 1

DVCC

V 02

1

z

V 01

y 2

z

x

C

DVCC

I x1

R 3

2

y 1

x

I x2

R 1 R 2

b

V 0+

V 01

t

V 0−
V Th

V 02

t

H

V TL

T 1 T 2

V 0 V 01 V 02 V 02

I x 2 ¼ ¼ ð 15 : 24 Þ

R 1 R 1

V 0
R 2

V 01
R 2 ¼

I z 2 ¼ ð 15 : 25 Þ

Because of V 01 being at V 0 , this reverses the output current of DVCC-I hence, V 02
is a negative going ramp. As soon as V 02 reaches the lower threshold level V TL ,V 01
switches back to positive saturation level V 0 and this cycle goes on repeating itself.
V TH and V TL can be calculated by using the following equations:

V 0 dV 02 t ðÞ

dt ¼

V TL V TH V 01

R 3 C ¼

V B V B

¼ ð 15 : 26 Þ

T 2 R 3 C