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

Abstract

: This paper brings in a new design, namely, voltage mode differentiator with an active element, Carbon Nanotube Field Effect Transistors Voltage Difference Transconductance Amplifier (CNVDTA). The circuit thus proposed needs one Carbon Nanotube Field Effect Transistors Voltage Difference Transconductance Amplifier (CNVDTA) element and a single capacitor. While fabricating IC’s in VLSI design, the proposed circuit proves more adaptable and applicable with the anticipated results. Methods: The proposed CNVDTA based voltage mode differentiator in CNFET technology was simulated at 32 nm at a voltage supply of ±0.9 V using the Cadence Virtuoso CAD tool. Results: It is also reported that the proposed circuit would function with ±0.9 V supply voltage and would also take care of the bias current of the order of 150 µA. Further, on the part of the transconductance (gm), it is electronically tunable with the help of bias current. Conclusion: The CNVDTA based differentiator has been found to be very useful in the triggering circuit of CRO’s, wave shaping circuits, power control circuits etc. It is also found useful in detecting the high-frequency components in the input signals.

Design and Analysis of Low-Power and High Speed Approximate Adders Using CNFETs

“…The CNTs employ two types, as follows: single walled carbon nanotube (SWCNT) and multi walled carbon nanotube (MWCNT). The SWCNT consists of a sheet of single cylinder of 1-2 nm and MWCNT consists of more single cylinder with 10 nm as illustrated in Figure 1, for more details, refer to references [20,21]. A SWCNT operates as semiconductor or a conductor which depends on the arrangement of atoms along the CNTs.…”

“…There are three types of SWCNT models, as follows: zigzag, armchair, and chiral CNTs. The three types of CNTs are shown in Figure 2 [21,22]. The n1 and n2 are the coefficients that signify the positive integers and features the chirality of the CNTs.…”