Voltage differencing current conveyor based linearly controllable quadrature oscillators

Abstract

This paper presents two new applications of modified version of the voltage differencing current conveyor (VDCC) active device in electronically linearly controllable quadrature oscillators. In this particular case, VDCC element is modified in such a way that it uses electronically adjustable current gain controlled independently in each of output current branches of this device. Brief Spice simulation tests based on emulators of VDCC employing commercially available subparts and including system for amplitude stabilization are also presented. Results confirmed expected behavior.

Design method for VDCC-based analog comb filter for power line interference cancellation

“…Due to the inherent properties of current mode circuits, including lower power consumption, wider bandwidth, higher dynamic range, and simpler architecture, several current mode blocks have gained prominence in designing various analog signal processing and generating circuits. These include second-generation current conveyor (CCII) [10] , voltage differencing transconductance amplifier (VDTA) [11] , differential difference current conveyor (DDCC) [12] , voltage differencing gain amplifier (VDGA) [13] , multiple output current differencing transconductance amplifier (MOCDTA) [14] , and voltage differencing current conveyor (VDCC) [15 , 16] . The VDCC is particularly noteworthy for its ability to offer electronically adjustable transconductance gain and facilitate the concurrent current and voltage transfer across its terminals.…”

Single VDCC-Based Electronically Tunable Voltage-Mode Second Order Universal Filter

“…Literature review shows that, a number of the analog circuits using VDCC as active element have been found for examples, inductance simulator [10][11], capacitance multiplier [12][13], versatile passive element simulator [14][15], square and triangular wave generator [16], sinusoidal oscillator [6,13,[17][18][19][20], first order allpass filter [21], ladder filter [22] etc. The VDCC based universal filters have been proposed in [23][24][25][26].…”

Simple Three-Input Single-Output Current-Mode Universal Filter Using Single VDCC

“…Analog circuits using the VDCC as the active element have been found in the literature for examples, the first order allpass filter [11], the ladder filter [12], the passive element simulator [10], [ [16], the square and triangular wave generator [17], sinusoidal oscillator [18]- [21], etc. The VDCC based universal filters have been proposed in [22]- [25].…”