TIME MARKER GENERATOR USING OPERATIONAL TRANSCONDUCTANE AMPLIFIER

2015 ◽  
Vol 76 (1) ◽  
Author(s):  
Avireni Srinivasulu ◽  
V. Tejaswini ◽  
T. Pitchaiah
Keyword(s):  
Sine Wave ◽  
Experimental Results ◽  
Model Parameters ◽  
Operational Transconductance Amplifier ◽  
Passive Components ◽  
Time Marker ◽  
Square Wave ◽  
Transconductance Amplifier ◽  
Technology Process ◽  
Wave Converter

This letter introduces time marker generator (TMG) using operational transconductance amplifier (OTA). It is composed of comparator (i.e. sine wave to square wave converter), integrator and clipper. The performance of the proposed circuit is examined using Cadence and the model parameters of a 180 nm technology process.  Later, the circuit was built with commercially available OTA (LM 13600), passive components used externally and tested at the outputs of comparator, integrator and clipper. Simulations and experimental results are shown that verify the proposed circuit of time marker generator.

TUNABLE WAVEFORM GENERATORS USING SINGLE DUAL-CURRENT OUTPUT OTAs

2008 ◽  
Vol 17 (06) ◽  
pp. 1193-1202 ◽  
Author(s):  
YU-KANG LO ◽  
HUNG-CHUN CHIEN ◽  
HUANG-JEN CHIU
Keyword(s):  
Pulse Width ◽  
Experimental Results ◽  
Pulse Waveform ◽  
Operational Transconductance Amplifier ◽  
Switching Element ◽  
Passive Components ◽  
Current Output ◽  
Transconductance Amplifier ◽  
Theoretical Analyses

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.

Operational Transconductance Amplifier-Based Electronically Controllable Memcapacitor and Meminductor Emulators

2021 ◽  
pp. 2150222
Author(s):  
Eyyup demir ◽  
Abdullah Yesil ◽  
Yunus Babacan ◽  
Tevhit Karacali
Keyword(s):  
Process Parameters ◽  
High Order ◽  
Crucial Importance ◽  
Operational Transconductance Amplifier ◽  
Passive Components ◽  
Mos Transistor ◽  
Transconductance Amplifier ◽  
Simulation Results ◽  
Layout Area ◽  
Electronically Controllable

In this paper, two simple circuits are presented to emulate both memcapacitor and meminductor circuit elements. The emulation of these components has crucial importance since obtaining these high-order elements from markets is difficult when compared to resistor, capacitor and inductor. For this reason, we proposed Multi-Output Operational Transconductance Amplifier (MO-OTA)-based electronically controllable memcapacitor and meminductor circuits. To operate the MOS transistor as a capacitor, drain and source terminals are connected to each other. The memcapacitor behavior is obtained by driving the connected terminals with suitable voltage values. Only a few active and grounded passive components which are found in markets easily are used to emulate meminductive behavior. Furthermore, all passive elements in the circuit are grounded. All simulation results for memcapacitor and meminductor emulators are obtained successfully when compared to previous studies. For all analyses, MO-OTA is laid using the Cadence Spectre Analog Environment with TSMC 0.18[Formula: see text][Formula: see text]m process parameters and occupied a layout area of only 86.21[Formula: see text][Formula: see text]m.

scholarly journals Practically Realizable Circuits for OTRA and their Implementation in Oscillators

2021 ◽  
Author(s):  
Bhawna Aggarwal ◽  
◽  
Rachit Bansal ◽  
Palak Agarwal ◽  
Shweta Gautam ◽  
...  
Keyword(s):  
Operational Amplifier ◽  
Current Conveyors ◽  
Operational Transconductance Amplifier ◽  
Passive Components ◽  
Oscillator Circuit ◽  
Operational Transresistance Amplifier ◽  
Transconductance Amplifier ◽  
Current Voltage

In this paper, practical circuits for operational transresistance amplifier (OTRA) realizable in lab using commercial ICs have been designed and proposed. 3 structures based on operational amplifier (OPAMP-LM741), operational transconductance amplifier (OTA-CA3080) and current conveyors II (AD844) have been proposed. In these proposed designs, conditions to mimic the current-voltage behavior of OTRA have been formulated using active and passive components. Moreover, these components are also used to achieve flexibility in transresistance gain of implemented OTRA. The behavior of the proposed OTRA structures have been validated using LTSPICE. Furthermore, to represent practical usability of these designs oscillator circuit have been designed and implemented on software and experimentally also on bread board. All the results prove the OTRA operation of the designed circuits and their usability in the practical environment.

scholarly journals Design of CDTA and VDTA Based Frequency Agile Filters

2014 ◽  
Vol 2014 ◽  
pp. 1-15 ◽  
Author(s):  
Neeta Pandey ◽  
Aseem Sayal ◽  
Richa Choudhary ◽  
Rajeshwari Pandey
Keyword(s):  
Signal To Noise Ratio ◽  
Cmos Technology ◽  
Functional Verification ◽  
Model Parameters ◽  
Maximum Output ◽  
Passive Components ◽  
Transconductance Amplifier ◽  
Frequency Agile ◽  
Output Noise ◽  
Current Difference

This paper presents frequency agile filters based on current difference transconductance amplifier (CDTA) and voltage difference transconductance amplifier (VDTA). The proposed agile filter configurations employ grounded passive components and hence are suitable for integration. Extensive SPICE simulations using 0.25 μm TSMC CMOS technology model parameters are carried out for functional verification. The proposed configurations are compared in terms of performance parameters such as power dissipation, signal to noise ratio (SNR), and maximum output noise voltage.

scholarly journals Operational Transconductance Amplifier in 350nm CMOS technology

2015 ◽  
Vol 19 (1) ◽  
pp. 32
Author(s):  
Dejan D. Mirković ◽  
Predrag M. Petković ◽  
Ilija Dimitrijević ◽  
Igor Mirčić
Keyword(s):  
Cmos Technology ◽  
Open Loop ◽  
Switched Capacitor ◽  
Loop Gain ◽  
Operational Transconductance Amplifier ◽  
Mixed Signal ◽  
Switched Capacitor Circuits ◽  
Transconductance Amplifier ◽  
Technology Process ◽  
Level Design

This paper presents transistor level design ofoperational transconductance amplifier in CMOS technology.Custom designed, circuit is to be built-in into the mixed-signal,switched capacitor circuit. Amplifier targets relatively high slewrateand moderate open loop gain with megahertz order gainbandwidth.Adopted architecture is discussed appreciatingapplication in switched capacitor circuits. Circuit behavior isexamined through set of simulations. Obtained results confirmeddesired behavior. Target technology process is TSMC 350nm.

Holdup and holdup profiles in the reciprocating plate extractor VPE

1990 ◽  
Vol 55 (11) ◽  
pp. 2648-2661 ◽  
Author(s):  
Helena Sovová ◽  
Vladislav Bízek ◽  
Jaroslav Procházka
Keyword(s):  
Steady State ◽  
Experimental Results ◽  
Model Parameters ◽  
Dispersed Phase ◽  
Pulse Form ◽  
Sieve Plates

In this work measurements of mean holdup of dispersed phase, of axial holdup profiles and of flooding points in a reciprocating plate contactor with both the VPE-type plates and the sieve plates were carried out. The experimental results were compared with a monodisperse model of steady-state column hydrodynamics and the model parameters were evaluated. Important differences in the behaviour of the two plate types could be identified. Comparison was also made between two reciprocating drives of different pulse form.

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