A Voltage-Mode First Order Allpass Filter Based on VDTA

The voltage-mode first order universal filter using single voltage differencing differential input buffered amplifier with electronic controllability

“…From the literature survey, the universal first-order filter using active elements and passive elements are has been published. However, the performances of the proposed filters in [7]- [9], [13] contain more than one active building block, lack of electronic controllability [9]- [14], [16], [17], output voltage node is not low impedance [17], and the proposed filters in [7], [8], [17], [9]- [16] are not verified experimentally. The voltage-mode first order universal filter using … (Danupat Duangmalai)…”

“…This circuit is constructed from a single VDTA and a capacitor, but its voltage output node is not low impedance. Additionally, the performances of the proposed filters in [7]- [17] are not verified experimentally.…”

“…However, the filtering parameters of theses first order filter [16] are not electronically tuned. The voltage differencing transconductance amplifier (VDTA) is employed to design the first order in [17]. This circuit is constructed from a single VDTA and a capacitor, but its voltage output node is not low impedance.…”

DV-EXCCCII-Based Electronically Tunable Voltage Mode All-Pass Filter

“…Nowadays, current mode (CM) technique-based circuit design is preferred over voltage mode (VM) technique due to its inherent property of large bandwidth, high slew rate, simple circuitry, low power consumption, etc. Some of the most considered current mode active analog block is second generation current conveyor (CCII) [2][3][4][5][6], third generation current conveyor (CCIII) [7], current controlled current conveyor (CCCII) [8], differential voltage current conveyor (DVCC) [9][10][11], differential difference current conveyor (DDCC) [12][13][14][15], differential current conveyor (DCCII) [16], voltage differencing transconductance amplifier (VDTA) [17], modified current conveyor (MCCII) [18], dual-X second generation current conveyor (DXCCII) [19], fully differential second generation current conveyor (FDCCII) [20], current feedback operational amplifier (CFOA) [21], current feedback amplifier (CFA) [22], differential voltage extra-X current controlled current conveyor (DV-EXCCCII) [23], operational transresistance amplifier (OTRA) [24] and many more.…”

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].…”