High Pass Filter and Bandpass Filter Using Voltage Differencing Buffered Amplifier

A novel filter is proposed in this work. Voltage differencing buffered amplifier (VDBA) as an active component is used in the implementation of the proposed filter. Also, one capacitor and one resistor are employed in the proposed filter as passive circuit elements. On the other hand, voltage differencing buffered amplifier (VDBA) can be easily constructed by using a CMOS transistor. One of the main advantages of the proposed filter is the feature of low output impedance resulting in easy cascadability with other current Mode circuits. Moreover, the quality factor of the proposed filter can be easily adjusted by changing value of only one of the resistors without disturbing its angular resonance frequency. Nonetheless, it requires a single resistive matching condition for proper circuit operation and a unity gain non inverting amplifier for highpass/bandpass filter responses. A number of simulation results are achieved by using 0.13 μm TSMC13RF technology parameters with 3.3 V DC power supply voltages. Power consumption of the proposed filter is approximately found as 1.9432 mW through SPECTRE simulations. Furthermore, experimental test results are included to confirm the theory.