537-545The application of
z-copy voltage differencing current conveyor (ZC-VDCC) in simple and
interesting first-order all-pass sections has been studied in the present
paper. The solutions presented here have presumptions for direct electronic
control. Some of proposed circuits offer curious possibilities of control.
Electronic controllability of the VDCC allows simultaneous zero and pole
frequency adjusting, separated zero or pole frequency adjusting or migration of
zero from left half plane to right half plane of complex space. Behavioral
models of VDCC based on commercially available devices are proposed and
selected type of all-pass section was verified by simulations and also by
measurements. Results of simulations, experiments, and theoretical proposal are
compared. Experiments confirm workability of proposed behavioral equivalent
circuit in bandwidths to units of MHz