Various applications of analog signal processing employing voltage differencing current conveyor and only grounded passive elements: a re-convertible approach

Abstract

A re-convertible circuit that can either act as a current-mode universal filter or as a fully un-coupled dual-mode singleresistance-controlled quadrature oscillator or simply works as a grounded loss-less inductor, by simple selection of appropriate passive switches, is proposed here. The proposed circuit requires a maximum of two voltage differencing current conveyors as an active element in the case of filter and oscillator application, whereas only one active device suffices the purpose of active inductor implementation. In all the cases only grounded passive elements are employed. Various regular analysis for the proposed circuits have also been included here to support the theoretical idea. The workability of these circuits has been demonstrated by practicing PSPICE simulation software with TSMC CMOS 0.18 μm process parameters along with the experimental justification of the derived application using commercially available integrated circuits.

Voltage Differencing Current Conveyor Based Voltage-Mode and Current-Mode Universal Biquad Filters with Electronic Tuning Facility

“…The performance parameters of the designed filters are summarized and compared with other previously published related works [1,[3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] in Table 4. It depicts that the designed filters consume least power among all the other circuits.…”

“…It offers only HP and LP filter responses. The VDCC based current-mode universal filters reported in [30][31][32] employ two active building blocks and four passive components. The center frequencies of these circuits are comparatively low.…”

A current mode instrumentation amplifier with high common-mode rejection ratio designed using a novel fully differential second-generation current conveyor

“…The low input impedance CMIAs utilize the advantages of CM signal processing and have attracted great interests especially after the introduction of CM alternative of Wheatstone bridge (Azka cell) [17]. However, most of the reported CMIAs are of the high input impedance ones [8,9] whose structures are classified into second-generation current conveyors (CCII)-based CMIAs [15,19] and current sensing-based CMIAs [8,20].…”

Programmable Universal Filter and Quadrature Oscillator Using Single Output Operational Transconductance Amplifiers

“…The structures in [52]- [57] realize universal filter and quadrature oscillator without changing any connection. In [52]- [53], either a universal filter or a quadrature oscillator can be obtained by selecting the switches, but passivematching condition is required for obtaining HP filtering response. In [54], the universal filter or the quadrature oscillator can be obtained by adjusting the ratio of resistances while in [55]- [57], the universal filter or the quadrature oscillator can be obtained by adjusting the ratio of bias currents.…”

“…The comparison of the proposed circuit with those of previous universal filters and quadrature oscillators is shown in Table 1. Compared with the circuits in [53]- [54], the proposed circuit offers electronic controls, without component-matching condition, high input impedance and using ground capacitor. Compared with the current-mode circuits in [55]- [57], the proposed circuit offers a new technique for obtaining universal filter and quadrature oscillator.…”