A Realization of Multi-Port Gyrator Using Current Mirror Circuits

Abstract

A current-mode signal processing circuit is quite attractive from low supply voltage operation and high frequency application. A current-mode continuous-time filters consist of simple bipolar current mirrors and capacitors and are quite suitable for monolithic integration.
In this paper, we proposed a design of multi-port gyrator using current mirror circuits. Using the multi-port gyrator and capacitors, we can simulate the passive LC filters. The tuning of the filter frequency can be achieved by adjusting the current of a single DC current source.
As examples, third-order and fifth-order lowpass filters are designed for frequencies of 20MHz to 80MHz. SPICE simulation results are shown to demonstrate the effectiveness of the proposed method.