Novel resistorless dual-output VM all-pass filter employing VDIBA

In this paper, a new active element called voltage differencing inverting buffered amplifier (VDIBA) is presented. Using single VDIBA and capacitor a new resistorless voltage-mode first-order all-pass filter is proposed, which provides both inverting and non-inverting outputs at the same configuration simultaneously. The pole frequency of the filter can be easily controlled by means of internal transconductance. No component-matching conditions are required and it has low sensitivity. The theoretical results are verified by SPICE simulations using commercially available integrated circuit models.