An Operational Transconductance Amplifiers Based Sinusoidal Oscillator Using CNTFETs

Abstract

1 Abstract-A new sinusoidal oscillator using Carbon Nanotube Field Effect Transistors (CNTFET) based Operational Transconductance Amplifiers (CNOTA) with grounded capacitors is presented in this paper. The proposed current-mode oscillator thus implemented and having grounded capacitor feature, fulfils the need for realizations of systems used in combination with various other systems/ subsystems -both voltage-mode and current mode. It also ensures simplicity in implementation by using a single-ended CNOTA. The analytical model is given for the circuit leading to fulfilment of the condition of oscillation at tuned frequency. The proposed sinusoidal oscillator is primarily used in the field of signal dispensation applications, telecommunication networks, communication-equipment and control modules. The benefits derived from the introduced model are validated by simulation carried out at a supply voltage of ±1.8 V in Cadence virtuoso using spectre model libraries. They are further tested with the aid of 32 nm model of Carbon Nanotube Field Effect Transistor (CNTFET) technology obtained through open source. The proposed design (and the model provided) is found to be in good agreement with the obtained results.

Dual Output Sinusoidal Oscillator Using Second Generation Current Controlled Conveyor

“…CCCII, a series of CCII, has the parasitic resistance at input port X which is current controlled. Thus, it has introduced the concept of Current Controlled Conveyor (CCCII) [7][8][9][10].…”

A Novel Dual Output Schmitt Trigger Using Second Generation Current Controlled Conveyor

“…The configuration of relaxation oscillator habitually consists of a Schmitt trigger and an integrator in a closed loop. Designers employed various active elements to realize these blocks [5], [8], [9], [12], [13]. Initially operational amplifiers were used, followed by operational transconductance amplifiers (OTAs), second generation current conveyors (CCIIs), differential difference current conveyors (DDCCs), current differencing transconductance amplifiers (CDTAs), differential voltage current conveyor (DVCC), current feedback operational amplifiers (CFOAs) etc., were used to realize waveform generators [12]- [30].…”

A Novel Simple Differentiator Circuit Based on Carbon Nano Tube Field Effect Transistors Voltage Difference Transconductance Amplifier

“…The movement of these electrons is limited as a consequence of structural alignment, which only allows movement along the tube axis. Hence, only carrier electrons flow in the direction of current flow, referred to as ultra elastic scattering mean-free-path [13,14]. Highly mobile electrons typically move in the range of 10 3 10 4 cm 2 /Vs as observed during experiments with transistors [14].…”

“…Hence, only carrier electrons flow in the direction of current flow, referred to as ultra elastic scattering mean-free-path [13,14]. Highly mobile electrons typically move in the range of 10 3 10 4 cm 2 /Vs as observed during experiments with transistors [14]. Few studies suggest that this mobility can be of the order of 10 4 cm 2 /Vs for CNT.…”