DESIGN OF ACTIVE 90-DEGREE PHASE DIFFERENCE NETWORKS,
Sebol,Ronald · Defense Technical Information Center (DTIC) · 1968
An active all-pass network that has two real axis poles and mirror image zeroes is analyzed and a means of realizing even-order 90-degree phase difference networks with this circuit is demonstrated. A step-by-step design procedure and the schematic of an 8th-order network constructed thereby are presented. (Author)