Transimpedance Type MOS-C Bandpass Filter Cores

In this paper, we present two area-efficient transimpedance type second-order analog filters. In many applications the signal generated and available is current, however the necessary signal for further processing is voltage type. For these applications the presented circuits will be very useful. The technique employed is MOS-only technique and to the best of our knowledge this is the first attempt to implement transimpedance filters with MOS-only technique. Starting from the core circuit biasing is illustrated and the functionality is shown with LTSPICE simulations using TSMC 180nm technology parameters.