Temperature-insensitive, Current Conveyor-based Floating Simulator Topology Montree Siripruchyanun *, Matheepot Phattanasak * and Winai Jaikla** * Department of Teacher Training in Electrical Engineering, Faculty of Technical Education, King Mongkut's Institute of Technology North Bangkok, Bangkok, 10800, THAILAND Email: mts@kmitnb.ac.th * * Electric and Electronic Program, Faculty of Industrial Technology, Suan Sunandha Rajabhat University, Dusit, Bangkok, 10300, THAILAND Email: jnai2004gyahoo.com Abstract- A novel circuit for realizing floating inductance, realize a lossless floating inductance capacitance and FDNR, floating capacitance, floating frequency dependent negative and can convert the grounded admittance into the resistance (FDNR) and grounded to floating admittance converter depending on the passive component selection is proposed in this correspondlng floating admittance without changing the paper. The proposed simulator employs second-generation original topology. Particular to this design, all of immittance current-controlled current conveyors (CCCILs), differential values are temperature-insensitive. Furthermore, the effects of voltage current conveyor (DVCC) and only grounded passive non-ideal gains on the proposed simulator are considered. The elements. The synthesized immittance values are temperature- PSPICE simulation results are also shown, which are in insensitive. The non-ideal current and voltage gains, as well as c parasitic impedance effects on the proposed circuit are investigated. Also, simulation results using PSPICE are given for II. PRINCIPLE AND OPERATION the introduced floating simulator to verify the theory and to exhibit the performances of the topology. A. TheDiferential Voltage Current Conveyor (DVCC) Index Terms- CCCII, Capacitor, DVCC, FDNR, Inductor. The DVCC, whose electrical symbol and equivalent circuit are shown in Fig. 1, is a four-terminal network with the I. INTRODUCTION terminal ideal characteristics described by following equation Recently, simulated immittance has become a standard Vx 0 1 -1 0 -Ix - research topic since it can be applied in areas like oscillator Ifyi 0 0 0 0 V I design, active filters, and cancellation of parasitic elements [1- I 0 0 0 0 v- (1) 2]. The advent of integrated circuits has encouraged the design IY2 0 0 0 Vz of synthetic inductances, which can be used instead of the z bulky inductors in passive filters. Since it is difficult to implement inductors and floating capacitors into integrated to.B o i circuits, several published circuits [2-15] employing different N z high-performance active building blocks have been introduced. Y2 DCC ZZ The literature surveys show that a large number of circuit X Y I d realizations for floating and grounded inductance simulators Ix have been reported [2], [5-10]. Unfortunately, these reported V V - V- 'x circuits suffer from one or more of following weaknesses xd - V1 a) Need for passive element matching [6-8], [12]. Figure 1. The DVCC (a) Symbol (b) Equivalent circuit b) Lack of electronic tunability [6-13], [16]. c) Use of a floating capacitor, which is not convenient to further fabricate in IC [6-13]. V d) Use of a capacitor connected to an inappropriate terminal, Y Iz X 1 V which results in an extra pole, and consequentially lower Xx Z frequency ofoperation [10], [13-16]. X> Ix . e) Provide only FDNR, floating or grounded inductance ------------------------------ simulator [ 10-15]. Figure 2. The CCCII (a) Symbol (b) Equivalent circuit f) Temperature dependency of the immittance values [2, 5- 10]. B. The Second Generation Current Controlled Current Conveyor As a solution, a circuit for the simulation of a floating (CCCHf) inductance, capacitance, FDNR, and grounded to floating The characteristics of the CCCII are represented by the admittance converter depending on the passive element choice following hybrid matrix is presented. The proposed circuit consists of CCCIIs and Ir 0 0 0 Vy DVCC as active components. In addition, the proposed circuit Vx= 1 Rx 0 Ix (2) employs one to two grounded resistors and one to two IZ 0 ±1 0 VZ grounded capacitors as passive components. The circuit can 65 1-4244-0797-41071$20.00 ©¢ 2007 IEEE