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In this paper, two new first-order voltage-mode all-pass filters (APFs) are proposed. Each of the proposed APFs comprises a single modified DDCC-, and has high input impedance. The first and second APFs can provide first-order noninverting and inverting APF responses, respectively. As passive elements, the first APF comprises two grounded capacitors, and a floating resistor while the second one uses a grounded resistor, a floating resistor and a grounded capacitor. However, both of the APFs suffer from a matching problem. Two quadrature oscillators (QOs) obtained from the APFs are presented. Simulations of the APF and QO circuits are fulfilled via the SPICE program. Besides, diverse experiments for the APFs are made to verify the performances. [ABSTRACT FROM AUTHOR]

In this paper, four immittance function simulators consisting of a single modified current follower with single Z− terminal and a minimum number of passive components are proposed. The first proposed circuit can provide +Lparallel with +Rand the second proposed one can realise −Lparallel with −R. The third proposed structure can provide +Lseries with +Rand the fourth proposed one can realise −Lseries with −R. However, all the proposed immittance function simulators need a single resistive matching constraint. Parasitic impedance effects on all the proposed immittance function simulators are investigated. A second-order current-mode (CM) high-pass filter derived from the first proposed immittance function simulator is given as an application example. Also, a second-order CM low-pass filter derived from the third proposed immittance function simulator is given as an application example. A number of simulation results based on SPICE programme and an experimental test result are given to verify the theory. [ABSTRACT FROM AUTHOR]

In this paper, a floating capacitance multiplier including two multioutput differential voltage current conveyors, two grounded resistors, and a grounded capacitor is proposed. The proposed floating capacitance multiplier can realize high capacitor values with two small-valued resistors. It is more suitable for integrated circuit technology because it has only grounded passive components without needing any critical passive component matching conditions. Its performances are examined with several simulations using the SPICE program. As an application example, a third-order notch filter using three resistors and three capacitors is given. [ABSTRACT FROM AUTHOR]

This paper introduces a new floating simulator circuit suitable for realizing a floating frequency dependent negative resistor (FFDNR) or a floating capacitance multiplier (FCM) with selections of the passive elements. In addition, a new circuit for realizing a simulated floating inductor (SFI) is introduced. The introduced FFDNR, FCM, and SFI use three current feedback operational amplifiers. The introduced FFDNR and FCM include a canonical number of passive components without any matching requirements, while the SFI contains three resistors and a grounded capacitor with a single resistive matching condition. Voltage-mode band-pass, low-pass, and notch filters are given as application examples. [ABSTRACT FROM AUTHOR]

In this paper, a modified voltage differencing voltage transconductance amplifier (MVDVTA) is proposed. A single MVDVTA based three circuits with a minimum number of only grounded passive components which are suitable for integrated circuit (IC) design are also proposed. The first circuit can realize lossless positive and negative floating inductor (FI), floating capacitor (FC) and floating resistor (FR) depending on the passive component selection. The second one is a floating frequency-dependent negative resistor (FFDNR) simulator. The third one is a quadrature oscillator (QO) with oscillation condition. The floating simulators are independent of passive component matching and/or cancellation conditions. Simulation results obtained from SPICE program and an experimental test result are given to verify the theory. In all the simulations, IBM CMOS 0.13 µm process parameters are used. [ABSTRACT FROM AUTHOR]

In this paper, two lossy grounded inductor simulators (GISs) and one lossless GIS including an inverting type current feedback operational amplifier (CFOA $$-$$ ), two resistors and a capacitor are proposed. All the proposed GISs can be easily obtained with commercial available active devices such as AD844s. Also, they do not need any critical passive component matching conditions. Both of the proposed lossy GISs employ a grounded capacitor, whereas the lossless one has a floating capacitor. In order to show performance of the proposed GISs, a number of simulation and experimental test results are given. [ABSTRACT FROM AUTHOR]

In this paper, a new two-input three-output second-order universal filter is proposed. Two multi-output voltage controlled current followers (MO-VCCFs) and two capacitors are used in the proposed filter. The proposed filter does not have external passive resistors. It has high output impedances yielding easy cascadability. It has the property of electronic tunability. It does not need any critical passive component matching conditions. Also, it is composed of only grounded capacitors; accordingly, it is suitable for integration. Theoretical knowledge is supported via SPICE simulations. [ABSTRACT FROM AUTHOR]

In this paper, a CMOS-based one input-two output current-mode (CM) circuit structure for providing full-wave rectification and half-wave rectifications to clarify the theory is proposed. The suggested configuration has many important advantages such as dissipating very less power, employing reduced number of CMOS transistors, having high output impedance cur-rents and without requiring any additional bias currents and voltages. In order to exhibit performance and effectiveness of the proposed topology, SPICE simulation results are given. [ABSTRACT FROM AUTHOR]

In this paper, novel low and high frequency performance improvement techniques are proposed. High frequency performance improvement method is based on the single pole effect reduction/completely elimination by creating a corresponding zero while a low one is based on reduction/elimination of Z terminal parasitic resistors. Therefore, two grounded capacitance multipliers, three grounded inductor simulators, a floating inductor and a voltage-mode (VM) universal filter using second-generation current conveyors (CCIIs) are used to explain the developed methods. One of the grounded inductor simulators, floating simulated inductor and VM biquad are novel. Further, both of the new simulated inductors use a grounded capacitor; accordingly, they are suitable for IC fabrication. However, all the proposed circuits need a single matching condition. A number of simulations through PSPICE program and experimental tests are accomplished to demonstrate the workability, performance and effectiveness. [ABSTRACT FROM AUTHOR]

The second generation current conveyors (CCIIs) as active circuit devices are widely used for designing current-mode (CM) filters. In this paper, a single input multi output filter employing only plus-type CCIIs (CCII+s) and grounded capacitors, and for providing variable gain low-pass and band-pass responses, is suggested. The proposed filter is free from critical passive component matching conditions. Therefore, it is suitable for integrated circuit (IC) technology. Further, developed filter configuration can be easily realized with commercially available active devices such as AD844s. The circuit performance is demonstrated by means of SPICE simulation and experimental test results. [ABSTRACT FROM AUTHOR]

The second generation current conveyors (CCIIs) as active circuit devices are widely used for designing current-mode (CM) filters. In this paper, a single input multi output filter employing only plus-type CCIIs (CCII+s) and grounded capacitors, and for providing variable gain low-pass and band-pass responses, is suggested. The proposed filter is free from critical passive component matching conditions. Therefore, it is suitable for integrated circuit (IC) technology. Further, developed filter configuration can be easily realized with commercially available active devices such as AD844s. The circuit performance is demonstrated by means of SPICE simulation and experimental test results. [ABSTRACT FROM AUTHOR]

In this paper, two new floating inductor simulators (FISs), both using two differential difference current conveyors, are considered. The proposed FISs do not suffer from passive component matching constraints and employ a minimum number of passive elements. They use a grounded capacitor; accordingly, they are suitable for integrated circuit technology. They have good low- and high-frequency performances. Simulations are performed with the SPICE program to verify the claimed theory. Moreover, for the first FIS used in a second-order low-pass filter, a stability test is performed as an example. [ABSTRACT FROM AUTHOR]

In this paper, a grounded voltage controlled resistor (GVCR) employing eight CMOS transistors, all of which are operating in saturation region, is proposed. The developed GVCR has two identical control voltages in opposite sign for electronically changing the resistance value. The linearity of the current-voltage (I - V) characteristic of the proposed GVCR is not affected by the body effect of the transistors. Computer simulation results with SPICE program are given to exhibit the performance and effectiveness of the introduced GVCR. [ABSTRACT FROM AUTHOR]