Electronically Tunable Current-Mode All-Pass Filter Based on Single Second-Generation Current-Controlled Current Conveyor

A novel current-mode all-pass filter (APF) that relies on a single second-generation current-controlled current conveyor (CCCII) is proposed in this article. The designed APF offers tunable phase control by DC bias current and low power consumption. This circuit configuration comprises a CCCII with a current gain of two and a capacitor connected to the ground. The proposed circuit achieves a first-order all-pass response without necessitating component matching. Moreover, the proposed APF functions with a low voltage of ±0.5V with a wide bandwidth is suitable for communication system. The characteristics and performances of the all-pass filter were confirmed through PSPICE simulation. The 0.18um TSMC CMOS model parameters were close to those of the theoretical analysis.