Figure 1 from High frequency Tow-Thomas tunable filter using OTA based voltage op-amp | Semantic Scholar
Filter Tow-Thomas (TT) Second Order Lowpass non-inverting · CircuitsArchive
Tow-Thomas Filter. Figure 16.4-4 shows another circuit that can be used to build a second-order filter. This circuit is called a Tow-Thomas filter. This filter can be used as either a band-pass