Single MO-CCCCTA-Based Electronically Tunable Current/Trans-Impedance-Mode Biquad Universal Filter

Abstract

This paper presents an electronically tunable current/trans-impedance-mode biquad universal filter employing only single multi-output current controlled current conveyor trans-conductance amplifier (MO-CCCCTA) and two grounded capacitors. The proposed filter realizes all the standard filter functions i.e. low pass (LP), band pass (BP) and high pass (HP), notch and all pass (AP) filters in the current form at high impedance output through appropriate selection of the input signals, without any matching conditions. Simultaneously, it can also realize all the standard filter functions in trans-impedance form from the same circuit topology. The circuit does not require inverting-type input current signal(s) and double input current signal(s) to realize all the responses in the design. The validity of proposed filter is verified through PSPICE simulations.

Tunable Mixed-Mode Voltage Differencing Buffered Amplifier-Based Universal Filter with Independently High-Q Factor Controllability

“…A deep investigation of the available literature reveals that several exemplary filter topologies introduced in [1,12,16,19,21,26,29,31,32,37,39,43,44] do not provide the different filtering responses in all four modes of operation. In [1][2][3][4][5][6][7][9][10][11][12][13]17,18,20,25,[27][28][29][30]32,36,38,40,41], they require more than two active components for the design.…”

“…The filter structures given in [3][4][5][6][7][8]10,12,16,18,22,23,25,31,35,36,38,41] do not provide the feature of inbuilt tunability of filter parameters. Furthermore, the important filter parameters, i.e., natural angular frequency (ω o ) and quality factor (Q), for the circuits [1,[5][6][7]12,13,[15][16][17]19,20,23,30,33,34,37,38,41] are interactive. Although the circuits of [4,13,22,25,27,[30][31][32]38] allow the realization of different functions of the universal filter with the same topology, they employ two different types of active components, which are not modular, and increase the complexity of the resulting circuit.…”

CMOS Realization of VDVTA and OTA Based Fully Electronically Tunable First Order All Pass Filter with Optimum Linearity at Low Supply Voltage ± 0.85 V

“…Recently, most widely active building blocks are used in the designing oscillators, grounded Inductor and active filter applications. These active building blocks namely operational Amplifier, Current-mode current, gain first-order all pass filters employing CFTAs [1], A voltage-mode first order all pass filter based on VDTA [2], Voltage-mode all-pass filters including minimum component count circuits [3], Voltage-mode cascadable all-pass section using single active element [4], Single VDVTA Based Voltage-Mode Biquad Filter [5], Single MO-CCCCTA-Based Electronically Tunable Current/Trans-Impedance-Mode Biquad Universal Filter [6], Electronically Tunable Low Voltage Mixed-Mode Universal Biquad Filter [7], Current-tunable current-mode all-pass section using DDCC [8], Electronically tunable first-order all pass section using OTAs [9], Current-mode multi phase sinusoidal oscillator using CDTA-based all pass sections [10], New resistorless and electronically tunable realization of dual-output VM all-pass filter using VDIBA [11], Cascadable Current-mode first order all-pass filter based on minimal components [12], Voltage-mode all-pass filters using universal voltage conveyor and MOSFET-based electronic Resistors [13], Voltage mode cascadable all-pass sections using single active element and grounded passive components [14], Electronically tunable first-order all-pass circuit employing DVCC [15], Novel voltage-mode all-pass filter based on using DVCCs [16], A Resistorless realization of the first-order all-pass filter [17], High input impedance voltage-mode first-order all-pass sections [18], Unity/variable-gain voltage-mode/current-mode first-order all-pass filters using single DXCCII [19], First-order voltage-mode all-pass filter employing one active element and one grounded capacitor [20], Component reduced all-pass filter with a grounded capacitor and high-impedance input [21], Realization of Grounded Inductor Based Band Pass Filter Design to Achieve Optimum Linearity with Bandwidth using Single VDVTA [22], Multi output filter and four phase sinusoidal oscillator using CMOS DX-MOCCII [23], FDCCII based Electronically Tunable Voltage Mode Biquad Filter [24], CDBA Based Inverse Filter [25].…”

Frequency Corrector Using Voltage Differencing Current Conveyor Transconductance Amplifiers

“…The current-mode example is available for example in [20]. The hybrid mixedmode circuits were developed and reported in studies [21], (current and transimpedance mode), [22], [23] (transadmittance and transimpedance mode) and [24] (transimpedance mode).…”