Design of a high performance mutually coupled circuit

Abstract

A novel high performance transconductorbased mutually coupled circuit topology is presented, employing four active devices (six, if differential-output devices are not available) and only grounded passive elements. The primary and secondary self-inductances and the mutual inductance can be controlled independently. Being constructed with integrator and transconductor blocks, the circuit offers excellent sensitivity, stability and high frequency performances. The current-conveyor-based implementation is also presented to avail comparison with previous counterparts. Via measurements and simulations, theoretical predictions are verified and the comparisons are performed. As an RF application example, a tuned amplifier is built and simulated.

Synthetic Transformer using Operational Transconductance Amplifier (OTA) and Voltage Differencing Current Conveyor (VDCC)

“…A transformer is a 4 port device (two input ports and two output ports) in which self-inductance and mutual inductance are present. An active mutually linked circuit with a mutual inductance (M) primary self-inductance (L1) and a secondary self-inductance (L2) is known as the synthetic transformer [5]. Figure 1 represents mutually coupled circuit [3].…”

“…Figure 1 represents mutually coupled circuit [3]. There is some correlation between the voltages and currents at the ports of synthetic transformer even in the absence of true magnetic coupling [5]. As a result, they limit the risk of magnetic interference by using only active components, resistors, and capacitors instead of inductive components.…”

A new electronically tunable mutually coupled circuit using current conveyor transconductance amplifiers (CCTAs)

“…A number of circuits have been published to simulate a MCC in the literature using operational amplifiers (Op-amps) [1][2][3], operational transconductance amplifiers (OTAs) [4][5][6], bipolar junction transistors (BJTs) [7,8], second-generation current conveyors (CCIIs) [9][10][11][12], current backward transconductance amplifiers (CBTAs) [13,14], current feedback operational amplifiers (CFOAs) [15], current conveyor transconductance amplifiers (CCTAs) [16,17], and voltage differencing current conveyors (VDCCs) [18]. Op-amp based realizations have some problems, such as constant gain-bandwidth product and low slew rate.…”

DVCCCTA-Based Implementation of Mutually Coupled Circuit

“…Some of these implementations [1][2][3][4][5][6][7] realize grounded MCC whereas a floating MCC realization is reported in [8]. The OTA-based MCC [1,2] employs eight OTAs and two grounded capacitors.…”

“…Reference [6] reports another CCCII-based MCC that uses five CCCIIs, two capacitors, and an inductor. Two circuits are reported in [7], the first circuit uses four OTAs, two resistors, and two capacitors whereas the second circuit makes use of two DVCCs; two CCIIs, six resistors, and two capacitors. The recently reported MCC [8] uses three CCCBTAs and three capacitors.…”