This article presents a voltage-mode first-order allconsumption and without electronic controllability. Recently, pass filter based on merely single current controlled current the current-controlled CDTA (CCCDTA) [24] has been differencing transconductance amplifiers (CCCDTA). The proposed, it was proved that it can overcome the mentioned features of the circuit are that: the pole frequency can be limitations of the CDTA. electronically controlled via the input bias current: the circuit The aim of this paper is to propose a voltage-mode firstdescription is very simple, consisting of merely single CCCDTA order all-pass filter emphasizing on the use of the CCCDTA. and single capacitor, without any matching condition constraint. Consequently, the proposed circuit is very appropriate to furtherThe features of the proposed circuit are that: the angle pole develop into an integrated circuit. The PSPICE simulation frequency can be electronically controlled: the circuit results are depicted. The given results agree well with the description is very simple, it employs only single CCCDTA theoretical anticipation. The power consumption is and single capacitor as passive component, which is suitable approximately 1.01mW at +1.5V power supply voltages. The for fabricating in monolithic chip. The performances of the application example as a quadrature oscillator is included.proposed circuit are illustrated by PSPICE simulations, they show good agreement with the calculation. The application I. INTRODUCTION example of the proposed all-pass filter as a quadrature An all-pass filter or phase shifter is one of the most oscillator is included. important building blocks of many analog signal processing applications and therefore has received much attention. It is II. PRINCIPLE OF OPERATION frequently used for introducing a frequency dependent delay while keeping the amplitude of the input signal constant over A. Current Controlled Current Differencing the desired frequency range. Other type of the active circuits Transconductance Amplifier such as oscillators and high-Q band-pass filters are also Since the proposed circuit is based on CCCDTA, a brief realized by using all-pass filters [1][2][3][4][5]. The literature surveys review of CCCDTA is given in this section. Generally, CCCDTA show that the voltage-mode first-order all-pass filter circuit properties are similar to the conventional CDTA, except that using different high-performance active building blocks such input voltages of CCCDTA are not zero and the CCCDTA has as, current conveyors (CCIIs) [3-4, 6-1 1], OTAs [12], current finite input resistances Rp and Rn at the p and n input controlled current conveyors (CCCIIs) [13-15], differential terminals, respectively. These parasitic resistances are equal and voltage current conveyor (DVCC) [16], differential difference can be controlled by the bias current IB1 as shown in the current conveyors (DDCCs) [17-18], current differencing B1 buffered amplifier (CDBA) [19] and operational following equation [24] transresistance am...

This article introduces a grounded capacitance multiplier employing current controlled current conveyor transconductance amplifiers (CCCCTAs). The provided capacitor is a grounded element. Its outstanding feature is that the capacitive value can be electronically adjusted by input bias currents of the CCCCTA and is temperature-insensitive. The circuit construction comprises two CCCCTAs, cooperating with a grounded capacitor. The circuit performances are depicted through PSPICE simulations, they show good agreement to theoretical anticipation. Application as a fifth-order Chebyshev low-pass filter is included.

This article describes an instrumentation amplifier circuit by using current controlled current conveyors transconductance amplifiers (CCCCTAs). The circuit provides high input impedance which is a desirable feature for instrumentation amplifier. The proposed circuit can also be electronically adjustable gain and using only active components. Furthermore, the circuit enables to operate with the low temperature-sensitive. Consequently, the proposed circuit is very suitable for further fabricating into integrated circuit (IC) form to employ in a sensitive environment system. Moreover, the proposed circuit can provide in both output voltage and current signals. Performances of the proposed circuit are confirmed through PSPICE simulation results, they are in accordant to theoretical explanations.

No abstract

No abstract