Journal ArticleDOI
Generation of square and triangular wave with independently controllable frequency and amplitude using OTAs only and its application in PWM
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TLDR
In this paper, a self-generating square/triangular wave generator using only the CMOS Operational Transconductance Amplifiers (OTAs) and a grounded capacitor is presented.Abstract:
This paper presents a self-generating square/triangular wave generator using only the CMOS Operational Transconductance Amplifiers (OTAs) and a grounded capacitor. The output frequency and amplitude of the proposed circuit can be independently and electronically adjusted. The proposed circuit validates its advantage by consuming less amount of power, which is about 71.3 µW. The theoretical aspects are authentically showcased using the PSPICE simulation results. The performance of the proposed circuit is also verified through pre layout and post layout simulation results using the 90 nm GPDK CMOS parameters. A prototype of this circuit has been made using commercially available IC CA3080 for experimental verification. Experimentation also gives the similar output as per the theoretical proposition. The designed circuit is also made applicable to perform pulse width modulation (PWM).read more
Citations
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Journal ArticleDOI
A novel Schmitt trigger and its application using a single four terminal floating nullor (FTFN)
TL;DR: A simple clock wise and counter clock wise Schmitt trigger employing single four terminal floating nullor (FTFN) with two external resistors is presented and it is extended for the application as a square and triangular wave generator, by adding an external capacitor to it.
Journal ArticleDOI
Fully Electronically Tunable and Easily Cascadable Square/Triangular Wave Generator with Duty Cycle Adjustment
Bhartendu Chaturvedi,Atul Kumar +1 more
TL;DR: A novel multiple-output dual-X current conveyor transconductance amplifier with buffer-based square/triangular wave generator is introduced in the paper.
Journal ArticleDOI
Self generating square/triangular wave and pulse width modulator using a single MO-CCCDTA
Abstract: A self-generating square/triangular wave and pulse width modulator (PWM) using multiple output current controlled current differencing transconductance amplifier (MO-CCCDTA) is presented. To obtain all the three functions simultaneously from the same topology, the MO-CCCDTA is modified a little bit. The characterisation of the modified MO-CCCDTA structure shows that the parasitic resistances at input terminals (n and p) can be varied via bias current. The maximum useful frequency range is found to be 635 MHz, which is higher than the available literature. The waveform generator and PWM circuit use only one MO-CCCDTA, one grounded capacitor and no resistor; hence suitable for IC implementation. The duty cycle of proposed pulse width modulation can be tuned by bias current of MO-CCCDTA over a wide range. The performances of the proposed block and its applications (square/triangular/PWM) are verified by PSPICE simulation using TSMC 0.35 µm technology. The power consumption is about 1.12 mW. To verify experimentally, a prototype of MO-CCCDTA has been made using commercially available ICs (AD844AN and CA3080) on printed circuit board. The simulation and experimental results verify theoretical proposition well. Monte carlo simulation is carried out, which proves satisfactory performance of the proposed circuit against mismatches. The performance of the proposed circuit is also verified through pre-layout and post-layout simulation results. The required chip area is only 22.415 × 14.6 µm2.
Journal ArticleDOI
A Low-Power Tunable Square-Wave Generator for Instrumentation Applications
TL;DR: A low-power fully on-chip tunable amplitude and frequency waveform generator (WFG) is proposed, designed and fabricated in the United Microelectronics Corporation 180-nm CMOS process technology with a 1.8-V supply.
Journal ArticleDOI
A bulk-driven differential CMOS schmitt trigger with adjustable hysteresis for ultra-low-voltage operation
TL;DR: Although the designed circuit is designed in the subthreshold region, it has a higher speed, and the variations of the hysteresis width are considerably wider compared to the similar works, which makes it suitable for ultra-low-power applications such as biomedical devices.
References
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MonographDOI
Analogue IC design : the current-mode approach
TL;DR: This book discusses current-mode Circuits from a Translinear Viewpoint, as well as applications of current-copier circuits, and the future of Analogue Integrated Circuit Design.
Book
Design with Operational Amplifiers and Analog Integrated Circuits
TL;DR: In this article, the authors present a design-oriented course for operational amplifiers and analog ICs, which includes additional problems, more in-depth coverage of negative feedback, more effective layout, updated technology (current feedback and folded-cascode amplifiers, and low-voltage amplifiers), and increased topical coverage (current-feedback amplifier, switching regulators and phase-locked loops).
Journal ArticleDOI
A unified analysis of PWM converters in discontinuous modes
Dragan Maksimovic,Slobodan Cuk +1 more
TL;DR: In this article, three discontinuous operating modes of PWM (pulsewidth modulated) converters are considered: the discontinuous inductor current mode (DICM), discontinuous capacitor voltage mode (DCVM), and a previously unidentified mode called discontinuous quasi-resonant mode.
Journal ArticleDOI
Triangular/square-wave generator with independently controllable frequency and amplitude
TL;DR: A triangular/square-wave generator with current-controllable frequency and amplitude and the application of the circuit to a current- Controllable saw-tooth waveform generator is presented.
Journal ArticleDOI
Current Conveyor-Based Square/Triangular Waveform Generators With Improved Linearity
TL;DR: Two second-generation current conveyor (CCII+)-based resistance-capacitance (RC) square/triangular waveform generators, which have been derived from their voltage-mode op-amp-based schemes, with independent control of frequency are presented.