Electronically tunable multi-input single-output voltage-mode filter

In this work, a new multi-input single-output voltage-mode filter realizing low-pass, band-pass, high-pass, notch and all-pass characteristics depending on the input signal selections is presented. The filter employs minimum number of passive elements, and does not need passive element matching. The presented filter has adjustable angular resonance frequency and quality factor, and low active and passive element sensitivities.