Low voltage CCII‐based high performance cascadable multifunctional filter

Abstract

Purpose -Aims to present a new low voltage CCII-based high frequency performance voltage mode multifunctional filter, which can realize standard biquadratic low pass, band pass and high pass functions through appropriate selection of admittances. Design/methodology/approach -Describes the filter which consists of a CMOS plus type CCII along with five passive components out of which four components are grounded while one is floating. Findings -Simulation results indicate matching between theoretical and simulated performances over a wide dynamic range. Originality/value -Provides simulation results that confirm the excellent performance of a multifunctional CCII þ filter.

High performance voltage output filter realizations using second generation voltage conveyor

“…Despite their numerous advantageous, most of the current conveyor‐based filters suffer from a serious drawback in applications requiring voltage output. For example, Figure shows two CM filters, based on CCIIs, in voltage‐input voltage‐output (a) and current‐input voltage‐output (b) configurations . As it is seen from Figure , for practical applications, extra voltage buffers (not shown) are required at the output nodes to ensure a low impedance.…”

“…Active filters play a fundamental role in analog signal processing. [1][2][3][4][5][6][7][8][9][10] They are used in various areas like communication, measurement, instrumentation, and control systems. The traditional method of implementing active filters is based on op-amps, resistors and capacitors which is not attractive anymore.…”

“…In recent years, the application of current-mode (CM) signal processing in filter design has received remarkable attention. [1][2][3][4][5][6][7][8][9][10] In CM circuits, the nodes impedances are low and the processed signals are currents which are not limited by supply voltages making this method highly suitable for low voltage design. 14 In addition, due to inherent high frequency performance and simplicity of CM signal processing, CM filters consume low power and require low chip area for a given frequency.…”

“…Profound investigations showing different kinds of filters have been designed using second generation current conveyors (CCIIs) and other current mode active building block. [1][2][3][4][5][6][7][8][9][10] Despite their numerous advantageous, most of the current conveyor-based filters suffer from a serious drawback in applications requiring voltage output. For example, Figure 1 shows two CM filters, based on CCIIs, in voltageinput voltage-output (a) and current-input voltage-output (b) configurations.…”

“…For example, Figure 1 shows two CM filters, based on CCIIs, in voltageinput voltage-output (a) and current-input voltage-output (b) configurations. 8,10 As it is seen from Figure 1, for practical applications, extra voltage buffers (not shown) are required at the output nodes to ensure a low impedance. This is the evident weakness of current conveyors for voltageoutput applications.…”