All-pass section with high gain opportunity
Künyeİbrahim, M. A., Minaei, S., & Yüce, E. (2010). All-pass section with high gain opportunity. In 33rd International Conference on Telecommunications and Signal Processing (pp. 14-17). Budapest: Asszisztencia Szervezo.
In this paper, a new circuit configuration for realizing voltage-mode (VM) all-pass section (APS) is presented. The circuit is cascadable with other VM circuits because of its high input and low output impedances. It consists of two differential difference current conveyors (DDCCs), one grounded resistor and one grounded capacitor. The proposed circuit can be slightly changed by using two additional grounded resistors to provide high gain. Moreover, a quadrature oscillator with minimum number of active and passive elements is derived from the proposed APS. SPICE simulations are performed to verify the theory.