Sait Türköz

Electronically tunable, active only floating inductance simulation

In this paper a new floating inductance simulator employing only active elements is proposed. The proposed circuit uses one internally compensated operational amplifier and one dual output current controlled conveyor (CCCII). The simulated inductance value can be controlled electronically by adjusting the bias current of the CCCII. No component matching constraints are imposed for the simulator and all active sensitivities are low. The performance of the circuit is demonstrated on a fourth-order elliptic filter using a SPICE simulation program

New current-mode current-controlled universal filter with single input and three outputs

In this study, a new current-mode current-controlled universal filter with single input and three outputs is presented. The proposed circuit uses single-output current controlled conveyors (CCCIIs) and can simultaneously realize lowpass, bandpass and highpass filter functions all at high impedance outputs. Realization of notch and allpass responses does not require additional active elements. The circuit enjoys independent current-control of the parameters ω0 and ω0/Q without disturbing the gains of the lowpass, bandpass and highpass filters. Both its active and passive sensitivities are low.

High output impedance current-mode lowpass, bandpass and highpass filters using current controlled conveyors

Three new current-mode second-order filter configurations which employ one or two current controlled conveyors (CCCIIs) and three passive elements are presented. Each proposed filter can realize one of the bandpass, lowpass or highpass responses all at high impedance outputs. The proposed filters offer current-control of pole angular frequency ωo without disturbing the parameter ωo /Q. No component matching is required and all the passive and active sensitivities are low. PSPICE simulation results are given to confirm the theoretical analysis.

A New Current-Controlled Sinusoidal Oscillator Using the Current Controlled Conveyor

A new current-controlled sinusoidal oscillator using three current controlled conveyors (CCCIIs) is presented. The proposed oscillator provides double-bias current-controlled oscillation frequency, fully independent control of oscillation condition and oscillation frequency and suitability for 1C implementation due to including only grounded passive elements. Theoretical results are confirmed with SPICE simulation results. bersicht Ein neuer stromgesteuerter Sinusoszillator unter Verwendung dreier stromgesteuerter bertrager (CCCIIs) wird vorgestellt. Die Frequenz des vorgeschlagenen Oszillators kann unabh ngig von der Schwingbedingung zweifach mit dem Vorstrom eingestellt werden. Alle passiven Elemente sind einseitig geerdet, so da die Schaltung gut f r eine monolithische Integration geeignet ist. Die theoretischen Ergebnisse werden durch SPICE-Simulationen best tigt. F r die Dokumentation Schaltungsentwurf / Oszillatoren / Strom bertrager / SPICE

New Current-Mode Current-Controlled Universal Filter implemented from Single-Output Current Controlled Conveyors

Ein neues stromgesteuertes universelles Filter vom Stromtyp auf der Basis von stromgesteuerten Übertragern mit singulärem Ausgang Abstract A new current-mode current-controlled universal filter is proposed. The circuit uses four single-output current controlled conveyors (CCCIIs) and two grounded capacitors and can simultaneously realize towpass, bandpass and highpass responses. The circuit enjoys independent control of the parameters <ao and lo^Q by adjusting the bias currents of the CCCIIs, without disturbing the gains of the lowpass, bandpass and highpass responses. No component matching is required and both its active and passive sensitivities are low. SPICE simulation results are given to confirm the theoretical analysis.

High performance CMOS realization of the third generation current conveyor (CCIII)

In this paper a new CMOS high performance dual-output realization of the third generation current conveyor (CCIII) is presented. The proposed CCIII provides good linearity, high output impedance at port Z and excellent input/output current gain. PSPICE simulation results using the MIETEC 1.2 /spl mu/m CMOS process model are included to verify the expected values.

A current-mode sample-and-hold circuit with high accuracy

In this paper a new current-mode sample-and-hold circuit is designed to obtain high-precision current processing and reduced feedthrough error simultaneously. The proposed sample-and-hold circuit uses regulated cascode current mirrors to increase the gain accuracy. Also a replication circuit is used for cancellation of the feedthrough error. The performance of the circuit is verified through SPICE simulations.

New current-mode lowpass, bandpass and highpass filters employing CCCIIs

Three new current-mode second-order filter configurations which employ one or two current controlled conveyors (CCCIIs) and three passive elements are presented. Each proposed filter can realize one of the bandpass, lowpass or highpass responses all at high impedance outputs. The proposed filters offer current-control of pole angular frequency coo without disturbing the parameter /spl omega//sub 0//Q. No component matching is required and all the passive and active sensitivities are low. SPICE simulation results are given to confirm the theoretical analysis.

New current-mode all-pass configuration using CCCIIs

In this paper a new configuration for the realization of first-order current-mode all-pass filters with high output impedance is presented. It can realize first-order allpass filtering function using two current controlled conveyors (CCCIIs) connected to four RC one-port elements. Eight different realizations for the proposed configuration are given in tabular form, which exhibit identical transfer functions but differ in the number of passive components, component matching constraints, possibility of electronic gain adjustment and other properties. PSPICE simulation results are given to confirm the theoretical analysis.

High output impedance current-mode multifunction filter employing CMOS dual output CCIIs and all grounded passive elements

This paper presents a new single-input multi-output type current-mode multifunction filter. The proposed filter can simultaneously realize three basic filter functions, all at high impedance outputs. The circuit employs only the same type of active elements and grounded passive components, permitting orthogonal adjustment of quality factor Q and /spl omega//sub p/ where no element matching conditions are imposed. The passive sensitivities are shown to be low.