Squarewave generators employing OTRAs

Hou, Chun Li; Chien, Heng-Chieh; Lo, Yu‐Kang

doi:10.1049/ip-cds:20045167

Cited by 63 publications

(27 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…1(b). The OTRA may also be implemented by using commercially available BJT based current-feedback operational amplifier (CFOA) IC AD844AN [28][29][30] as in Fig. 1(c).…”

Section: The Proposed Circuitmentioning

confidence: 99%

Voltage mode third order quadrature oscillators using OTRAs

Nagar

Paul

2016

Analog Integr Circ Sig Process

View full text Add to dashboard Cite

In this paper, the authors present two topologies of voltage mode third order quadrature oscillator circuit using operational transresistance amplifier (OTRA). The first circuit is based on low-pass filter and integrator combination, whereas the second one is high-pass filter and differentiator combination. Both the circuits utilize two OTRAs and three resistors and capacitors each. The frequency of oscillation and condition of oscillation can be adjusted independent of each other in both the circuits. The non-ideality analysis of the circuits are also included. The PSPICE simulation and experimental results verify the theoretical proposition.

show abstract

“…1(b). The OTRA may also be implemented by using commercially available BJT based current-feedback operational amplifier (CFOA) IC AD844AN [28][29][30] as in Fig. 1(c).…”

Section: The Proposed Circuitmentioning

confidence: 99%

Voltage mode third order quadrature oscillators using OTRAs

Nagar

Paul

2016

Analog Integr Circ Sig Process

View full text Add to dashboard Cite

show abstract

“…Its main application is to decrease noise effect in triggering devices and analog to digital conversion [2,3]. Additionally, it is a principal block employed in a square wave generator [4][5][6][7][8][9], pulse width modulator (PWM) [10][11][12][13], monostable multivibrator [14][15][16][17], and etc. Conventionally, there are two techniques to implement the Schmitt triggers.…”

Section: Introductionmentioning

confidence: 99%

Fully and electronically controllable current-mode Schmitt triggers employing only single MO-CCCDTA and their applications

Silapan

Siripruchyanun

2011

Analog Integr Circ Sig Process

View full text Add to dashboard Cite

This article presents the new current-mode counterclockwise (CCW) and clockwise (CW) Schmitt triggers based on multiple-output current controlled current differencing transconductance amplifier (MO-CCCDTA). The circuit descriptions are very simple, each construction consists of only single MO-CCCDTA, without any external passive element. The hysteresis and amplitude of the output current of each Schmitt trigger can be tuned independently/ electronically by input bias currents. In addition, the output signals are independent of the thermal voltage (V T ). The applications as a relaxation oscillator, triangular/square wave generator, pulse width modulation and monostable multivibrator are given here to display the usefulnesses of the presented Schmitt triggers. The PSpice simulation and experimental results are depicted, and agree well with the theoretical anticipation. The maximum power consumptions of CCW and CW Schmitt triggers are approximately 235 and 191 lW, respectively, at ±1.5 V supply voltages.

show abstract

“…4,5 Waveform generators are the basic cells for many electronic systems. 6,7 For example, digital systems often need clock signals to ensure the proper timing. Some power electronics converters contain function generators in their controllers.…”

Section: Introductionmentioning

confidence: 99%

TUNABLE WAVEFORM GENERATORS USING SINGLE DUAL-CURRENT OUTPUT OTAs

Chien

Chiu

2008

J CIRCUIT SYST COMP

View full text Add to dashboard Cite

Two novel electronic-tunable waveform generators using a single dual-current output operational transconductance amplifier (DO-OTA) with a few passive components are proposed in this paper. The first one can produce symmetrical square and triangular waveforms simultaneously. Based on the first topology, an additional N-MOS is adopted as a switching element to construct the second proposed circuit, which can generate a pulse waveform by a negative triggering signal. The repetitive frequency and pulse width of the presented circuits are adjustable by external passive components. Moreover, the output levels of the proposed circuits can be controlled by the DO-OTA's bias currents. These waveform generators feature more compact configurations compared to the existing designs. Experimental results are close to the theoretical analyses.

show abstract

Squarewave generators employing OTRAs

Cited by 63 publications

References 2 publications

Voltage mode third order quadrature oscillators using OTRAs

Voltage mode third order quadrature oscillators using OTRAs

Fully and electronically controllable current-mode Schmitt triggers employing only single MO-CCCDTA and their applications

TUNABLE WAVEFORM GENERATORS USING SINGLE DUAL-CURRENT OUTPUT OTAs

Contact Info

Product

Resources

About