Current mode Schmitt trigger based on ZC-Current Differencing Transconductance Amplifier

2016 ◽  
Author(s):  
Suma Madira ◽  
V. Venkata Reddy ◽  
Avireni Srinivasulu
Keyword(s):  
Current Mode ◽  
Schmitt Trigger ◽  
Transconductance Amplifier ◽  
Current Differencing Transconductance Amplifier

SYNTHESIS OF CURRENT DIFFERENCING TRANSCONDUCTANCE AMPLIFIER-BASED CURRENT LIMITERS AND ITS APPLICATIONS

2011 ◽  
Vol 20 (02) ◽  
pp. 185-206 ◽  
Author(s):  
WORAPONG TANGSRIRAT ◽  
TATTAYA PUKKALANUN ◽  
WANLOP SURAKAMPONTORN
Keyword(s):  
Piecewise Linear ◽  
Current Mode ◽  
Building Blocks ◽  
Transfer Characteristic ◽  
Piecewise Linear Function ◽  
External Bias ◽  
Full Wave ◽  
Transconductance Amplifier ◽  
Electronically Tunable ◽  
Current Differencing Transconductance Amplifier

A synthesis of analog current limiter (CL) building blocks based on a current differencing transconductance amplifier (CDTA) is proposed. The breakpoint and the slope of the resulting transfer characteristic obtained from the proposed CDTA-based CL are electronically programmable through the external bias currents. To demonstrate versatility of the proposed electronically tunable CLs, some nonlinear applications to programmable current-mode precision full-wave rectifiers and piecewise-linear function approximation generators are also presented. PSPICE simulation and experimental results confirm the effectiveness of the proposed circuits.

scholarly journals Schmitt Trigger Circuits using Various Active Devices

2019 ◽  
Vol 9 (1S5) ◽  
pp. 143-146
Keyword(s):  
Analog Circuit ◽  
Schmitt Trigger ◽  
Current Conveyor ◽  
Vast Number ◽  
Active Devices ◽  
Op Amp ◽  
The Past ◽  
Transconductance Amplifier ◽  
Current Differencing Transconductance Amplifier ◽  
Analog Processing

A vast number of diverse analog circuit blocks have been arosed in the past few decades. A various active devices are Operational Amplifier (Op-Amp), Current Conveyor (CC), Operational Transconductance Amplifier (OTA), Differential Difference Current Conveyor (DDCC), Differential Difference Current Conveyor Transconductnace Amplifier (DDCCTA), Z-Copy Current Differencing Transconductance Amplifier (ZC-CDTA), Voltage Difference Transconductance Amplifier (VDTA) and so on. A review on Schmitt trigger circuits by using different active devices are presented in this paper since Schmitt trigger circuits are widely used in numerous applications such as in waveform generators, wave-shaping circuits, comparators, Bio-medical applications, analog processing systems, communication and instrumentation systems.

Modified current differencing transconductance amplifier – new versatile active element

2012 ◽  
Vol 60 (4) ◽  
pp. 739-750 ◽  
Author(s):  
A. Malcher
Keyword(s):  
Signal Processing ◽  
Active Element ◽  
Current Mode ◽  
Input Resistance ◽  
Analog Signal ◽  
Output Stage ◽  
Spice Simulation ◽  
Transconductance Amplifier ◽  
Simulation Results ◽  
Current Differencing Transconductance Amplifier

Abstract This paper introduces a new current mode component called Modified Current Differencing Transconductance Amplifier (MCDTA). Important parameters of the circuit i.e. input resistance, z terminal resistance and transconductance of the output stage can be tuned electrically. The circuit can be implemented in linear and non-linear analog signal processing. The paper presents an example of the MCDTA application - a complete quadrature oscillator with the amplitude regulation. The functionality of the example circuit and its tuning capability were proved by the SPICE simulation results.

scholarly journals A New High Precision Power Detector of Complex Voltage Signals

2015 ◽  
Vol 15 (4) ◽  
pp. 184-195 ◽  
Author(s):  
Predrag B. Petrović
Keyword(s):  
Current Mode ◽  
Frequency Range ◽  
Transconductance Amplifier ◽  
Operating Frequency Range ◽  
Measurement Results ◽  
Power Detector ◽  
Current Differencing Transconductance Amplifier ◽  
A Current ◽  
Wide Operating ◽  
Better Than

Abstract A current-mode bipolar power detector based on a novel synthesis of translinear loop squarer/divider is presented. The circuits consist of a single multiple-output current controlled current differencing transconductance amplifier (MO-CCCDTA), two current controlled conveyors (CCCII), and one resistor and one capacitor that are both grounded. The errors related to the signal processing and errors bound were investigated and presented in the paper. The PSpice simulation and experimental results are depicted, and agree well with the theoretical anticipation. The measurement results show that the scheme improves the accuracy of the detector to better than 0.04 % and wide operating frequency range from 50 Hz to 10 MHz. The maximum power consumption of the detector is approximately 5.80 mW, at ±1.2 V supply voltages.

Voltage tunable current MODE KHN filter based on current differencing transconductance amplifier (CDTA)

2021 ◽  
pp. 2150181
Author(s):  
Rohit Thakur ◽  
Sangeeta Singh
Keyword(s):  
High Reliability ◽  
Cutoff Frequency ◽  
Current Mode ◽  
Input Voltage ◽  
Design Flexibility ◽  
Current State ◽  
Transconductance Amplifier ◽  
Unique Approach ◽  
Current Differencing Transconductance Amplifier ◽  
Great Dependency

The era of SoC design has great dependency on CMOS circuits owing to its low power and high reliability which could contribute in the effective circuit designing. Here, a unique approach for the designing of voltage tunable current differencing transconductance amplifier (CDTA) is reported for the realization of Kerwin–Huelsman–Newcomb (KHN) filter. The proposed design has been simulated by using Cadence Virtuoso simulation tool with 0.18 [Formula: see text]m technology parameters. This design is based on input voltage-based gain and frequency of operation tuning approach. In this reported design of filter, cutoff frequency can be tailored by input voltage instead of input current. This relaxes the need for the iterative circuit modifications to work in a particular frequency range. Thus, the reported CDTA design is expected to be robust and offers higher design flexibility as there is now no need of iterative designing and calibration in this approach. This also exhibits retained area requirement as per the current state of the art for the KHN filters. Further, the performance of designed CDTA-based KHN filter has also been verified with the existing KHN filters.

Signal Flow Graph Synthetical Implement the Current-Mode Multifunction Filter Based on CDTA

2014 ◽  
Vol 530-531 ◽  
pp. 1100-1107
Author(s):  
Hai Zhen He ◽  
Jun Kuang ◽  
Xin Liu ◽  
Xin Hang Huang ◽  
Mei Li Cao
Keyword(s):  
Integrated Circuit ◽  
Current Mode ◽  
Signal Flow Graph ◽  
Flow Graph ◽  
Signal Flow ◽  
Transconductance Amplifier ◽  
Multifunction Filter ◽  
Component Matching ◽  
Current Differencing Transconductance Amplifier ◽  
High Output

In this paper, a signal flow graph structure of current-mode multifunction filter using current differencing transconductance amplifier (CDTA) is presented. The proposed configuration is comprised of two grounded capacitors and four CDTAs. They exhibit low-input and high-output impedances, which is very convenient for integrated circuit implementation. The presented filter configuration can realize all the standard filter functions simultaneously, lowpass (LP), bandpass (BP), highpass (HP), bandstop (BS) and allpass (AP), without any component matching conditions. The natural frequency () and the bandwidth () of the proposed filter can be electronically tuned by varying the bias current of the CDTA. PSPICE simulation results are included to confirm the theory.

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