Current Conveyor All-Pass Sections: Brief Review and Novel Solution

Table 1

Comparative study.

Circuit	VFs required	IVFs required	CFs required	Appropriate input, output impedances	AD-844s required for breadboarding
[1]	1	0	1	No	2
Modified [1]	3	0	1	Yes	4
Filter-4 in [16]	2	1	2	Yes	4
Proposed	3	0	1	Yes	3