A single fully differential second-generation current conveyor (FDCCII) and grounded passive components, as well as two new cascadable voltage mode (VM) first-order all-pass (AP) filters, are proposed in this study. From a cascading point of view for voltage-mode circuits, all of the presented designs have the characteristics of higher input and lower output impedances. To evaluate the effectiveness of the filters and confirm the proposed theory, simulation results using the SPICE tool are used.

Objective: In this paper, a novel third order sinusoidal oscillator based on current controlled differential difference current conveyor transconductance amplifier (CCDDCCTA) is proposed. Methods: The proposed circuit configuration consist of single CCDDCCTA, two grounded resistor and three capacitors. It can concurrently yield output voltage and current. The amplitude of output current can be easily tuned by the bias current. The non-ideality and Monte-Carlo analysis are discussed and presented. Results: The stated results agree well with the theoretical estimation. Conclusion: The performance ofa proposed oscillator are analyzed with ORCAD 16.6 simulator and the analog block has been depicted using 0.25 μm CMOS TSMC technology parameters.

A new electronically tunable quadrature oscillator is presented using a biquad band pass filter. The new band pass filter is designed using two dual X second-generation multi-output current conveyors (DX-MOCCIIs), two grounded capacitors, two grounded resistors and one NMOS transistor working in the triode region. It is used to design a four-phase voltage and three-phase current output quadrature oscillator simultaneously. The frequency of the oscillator can be tuned externally through the MOS gate voltage without affecting the condition of oscillation. The phase noise, frequency stability and nonideality analysis are given. The functionality of the oscillator circuit has been confirmed by SPICE simulation and also hardware realization using commercially available IC AD844.

A second-order sinusoidal oscillator realization is presented using biquad band-pass filter. It uses non-inverting type of band-pass filter with unity-gain feedback to generate sinusoidal oscillation. The current-controlled differential difference current conveyor transconductance amplifier (CCDDCCTA) block-based band-pass filter is proposed to implement sinusoidal oscillation. The oscillator is found to posses both the voltage and current outputs simultaneously. It is also observed that the amplitude of the output current of the oscillator can be varied using bias current of CCDDCCTA. The feature of an oscillator like non-ideality has also been discussed for the proposed oscillator. The theoretical propositions have been verified through SPICE-based OrCAD 16.6 circuit simulator.

In this article, new single-input-multiple-output (SIMO)-type current-mode (CM) universal filter is realized using two dual-X second generation multi-output current conveyor (DX-MOCCII)., two resistor, two capacitor and single nMOS transistor used to operate in linear region. The presented filter circuit can give all five standard filter functions simultaneously, namely low and high pass (LP and HP), notch (NH), band-pass (BP), and all-pass (AP) outputs at various high impedance output terminals. This approach is beneficial for providing a facile cascading scheme in current mode operations. The parameters of the filter such as quality factor (Q) and frequency (ω o ) can be tuned through the grounded passive elements. The functionality of presented circuits is verified by SPICE (OrCAD) simulations, which show well agreement with the proposed theory.

The realization of voltage mode (VM) and current mode (CM) sinusoidal oscillator using current-controlled differential difference current conveyor transconductance amplifier (CCDDCCTA) and all grounded passive elements is proposed. The circuit configuration consists of single CCDDCCTA, two capacitors, and single resistor. The utilization of grounded passive components is good for IC fabrication. The frequency of oscillation can be altered independent of condition of oscillation by external bias currents. The passive sensitivities are low. The PSPICE based OrCAD 16.6 circuit simulator is used to perform simulations. The CCDDCCTA building block has been designed using CMOS 0.25 mu m TSMC technology parameters. Simulation results to verify the theory are given.

A novel third order sinusoidal oscillator based on current controlled differential difference current conveyor transconductance amplifier (CCDDCCTA) is proposed. The proposed circuit configuration using single CCDDCCTA, two grounded resistor and three capacitors has voltage and current outputs. It can concurrently yield output voltages and current and an amplitude controllable output current. The PSPICE simulation results are represented, the stated results agree well with the theoretical estimation. The performances of proposed oscillator are analyse with ORCAD 16.6 simulator and the analog block has been depicted using 0.25 μm CMOS TSMC technology parameters.

a In this article, a new design for realizing voltage-mode (VM) first order all-pass filter (APF) using single dual-X second generation current conveyor (DXCCII), one capacitor, one grounded resistor and one NMOS transistor operating in triode region is presented. The proposed circuit is analyzed for non-ideality presence due to voltage and current tracking errors and also due to parasitic components of the DXCCII to check the effect on functionality of proposed all-pass filter. PSPICE simulation and AD844 analogue IC-based experimental results are included to verify the proposed theory of the circuit.

This paper presents the design of 10-bit current steering DAC of binary and segmented architectures with 400MHz clock frequency. This circuit is designed in 130nm technology; with a supply voltage of 3.3V.This design is based on double ended current steering DAC topology. By observing different current cell architectures the best current cell is chosen for these architectures. The DAC is implemented using 130nm CMOS technology consumes 41.2mW for binary and 41mW for segmented (7:3) at 400MHz clock rate.

In this paper, a new design has been proposed for the realization of grounded and floating memristor emulators built with two OTAs and one grounded capacitor. The proposed emulators can be configured in both incremental and decremental topology. This paper also proposes the application of memristor as Amplitude Modulator (AM). The proposed circuit and its application claim that the circuit is much simpler in design and can be utilized in both topologies. The performance of all the proposed circuits has been verified with Cadence Virtuoso Spectre. Furthermore, post-layout simulations and its comparison have been carried out. Moreover, experimentation of the circuits has also been performed and found satisfactory results.

This article presents a new current mode single-input-multiple-output nth order universal filter. The proposed circuit employs (n + 1) number multiple output second generation current conveyors and n number grounded capacitors only. Presented circuits can realize current mode low pass, high pass, band pass, notch and all pass responses simultaneously at different high output impedance terminals. The current mode filter circuit provides low input impedance by selecting the proper value of bias current and also has high output impedance, which is suitable for cascading. The circuit offers some important features such as resistor less realization, no passive component matching constraints, low sensitivity, electronic tunability and active-C realization. The functionality of the proposed filter circuit is tested with the PSPICE simulation, which is found to agree well with the proposed theory.

The paper presents a new second-order single input multiple output (SIMO) type current mode (CM) universal filter. The proposed circuit uses two dual-X second generation multi-output current conveyors (DX-MOCCII), two grounded capacitors and three grounded resistors. The circuit configuration realizes low-pass filter (LPF), high-pass filter (HPF), band-pass filter (BPF), notch filter (NF) and all-pass filter (APF) responses simultaneously at different output terminals. The new circuit enjoys the features of low input impedance and high output impedance, which is desirable and useful for cascadability in CM circuits. For realizing the universal filter responses, the proposed circuit configuration does not require matching constraint of passive components and both active and passive sensitivities are found low. In addition, the extension of the proposed circuit as a resistorless universal filter has also been presented. As an application of the proposed filter, inverting band pass output is connected to a negative unity gain current follower in a close loop to design voltage and CM multiphase sinusoidal oscillators (MSOs). Comparison of the proposed configuration with available literature is given. The PSPICE simulation of the filter and its application as MSO are performed to verify the agreement with the theoretical proposition.

In this article a new current mode first order universal filter with single input and multiple outputs is proposed. The realization uses single dual-X multiple output second generation current conveyor (DX-MOCCII) and two passive grounded components. The presented circuit provides high-pass, low-pass and non-inverting and inverting all-pass responses simultaneously, all at different high impedance outputs. The realized circuit does not require any component matching constraint and all the sensitivities are found low. As an application the non-inverting all-pass filter is cascaded in a close loop with the current mode non-inverting integrator to design a current mode multiphase sinusoidal oscillator (MSO) having six phases. Voltage mode six phase sinusoidal oscillator is also achieved by resistively loading the current mode outputs. The analysis such as phase noise, non-ideality, stability and Monte Carlo are presented and discussed. The presented theory and its results are validated using 0.25µm process parameters of TSMC in PSPICE simulator.

A novel design of voltage-mode (VM) all-pass filter (APF) utilizing a single dual-X current conveyor (DXCCII) is proposed. Although many other voltage mode first-order APFs are available in literature, however majority of them cannot allow us to get high input impedance, low output impedance and grounded capacitor properties together. The proposed circuit offers these properties with reduced number of passive components. Experimental and SPICE simulation outputs are provided to validate the proposed theoretical result.