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A compact floating and grounded memristor model using single active element
(2022-12-01)
Prasad, Sagar Surendra
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Kumar, Prashant
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Raj, Niranjan
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Sharma, Pankaj Kumar
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Priyadarshini, Bindu
Memristor with defined operational specifications is a challenging task that promotes innovation in emulation circuit modelling. This article presents a single active block based compact memristor emulator architecture which is suitable for both floating and grounded circuit topologies. It effectively operates in incremental/decremental modes in both the configurations. The proposed model utilizes only one Differential Voltage Current Conveyor Transconductance Amplifier (DVCCTA) as an active block along with a few passive components. It discourages the use of extra sub-circuit components like multiple active blocks, summers and multipliers. The circuit is intended to work at ±1 V of dc power supply and has a power consumption of 8.74 mW. The proposed emulator model exhibits all the characteristics of an ideal memristor with an operating frequency of 12.8 MHz. It has wide working voltage range of 50–500 mV. The memristor model is built and simulated using the TSMC 0.18 μm CMOS process parameter. The reliability and effectiveness of the proposed model is verified through non-ideal, Monte-Carlo, process corner, non-volatility and temperature variation analysis. Furthermore, the memristor prototype is constructed on the breadboard using discrete ICs AD844AN and CA3080. The experimental outcome is found in accordance with the simulation. The applicability of the proposed memristor model is verified by implementing a memristor based Schmitt trigger circuit.
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Cmos single input multiple output universal biquad filter current-mode using only otas
(2021-01-01)
NONTHAPUTHA, Thanat
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KUMNGERN, Montree
This paper presents a new single-input multiple-output universal biquad filter in current-mode with only four operational transconductance amplifiers (OTAs) and two grounded capacitors. The proposed filter can be obtained all filtering functions, low-pass, high-pass, band-pass, bandstop and all-pass filter that the transfer functions of the filter can be selected by choosing appropriate current output without any component matching conditions. The natural frequency and quality factor of all filtering functions can be controlled electronically and orthogonally using the bias currents of transconductance amplifiers. The active and passive sensitivities of the filters are low. The proposed filter has been simulated using 0.18 μm CMOS process from TSMC. PSPICE simulation results are included to confirm workability of the proposed circuits.
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Current mode pulse width modulation/pulse position modulation based on phase lock loop
(2017-05-01)
Wisartpong, Pichet
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Silaphan, Vorapong
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Kurutach, Sunee
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Wardkein, Paramote
In this paper, the fully integrated CMOS current mode PLL with current input injects at the place of input or output of the loop filter without summing amplifier circuit. It functions as PPM and PWM circuit is present. In addition, its frequency response is an analysis which electronic tuning BPF and LPF are obtained. The proposed circuit has been designed with 0.18 μm CMOS technology. The simulation results of this circuit can be operated at 2.5 V supply voltage, at center frequency 100 MHz. The linear range of input current can be adjusted from 43 μA to 109 μA, and the corresponding duty cycle of pulse width output is from 93% to 16% and the normalized pulse position is from 0.93 to 0.16. The power dissipation of this circuit is 4.68 mW with the total chip area is 28 μm× 60 μm.
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Electronically tunable MOS-only current-mode high-order band-pass filters
(2017-01-01)
Prommee, Pipat
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Tiamsuphat, Aphinat
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Taher Abuelma'Atti, Muhammad
This paper presents new CMOS current-mode ladder Chebyshev and elliptic band-pass filters (BPFs). The signal flow graph and the network transformation methods are used to synthesize the proposed BPFs by using Chebyshev and elliptic RLC low-pass prototypes. CMOS-based lossy and lossless integrators with grounded capacitors are used to synthesize the proposed BPFs. The proposed filters can be electronically tuned between 10 kHz and 100 MHz by adjusting the bias current from 0.02 A to 200 A. Both filters use a 1.5 V DC power supply, which leads to low dynamic power consumption. Both filters enjoy total harmonic distortion of less than 1.5% along the range of the tuning bias currents. Simulation results are included to illustrate the functionality of the proposed filters.
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A novel current-mode temperature-insensitive APF using a single CCCII+2 with grounded capacitor
(2016-01-01)
Kaewdang, Khanittha
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Kumwachara, Kiattisak
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Surakampontorn, Wanlop
A novel first-order all-pass filter (APF) using a single positive second-generation current conveyor of current gain equal to 2 (named as CCII+2), one grounded capacitor and one resistor is proposed. From the proposed CCII+2 based filter, by replacing the CCII+2 and the resistor with a positive second-generation current-controlled conveyor of current gain equal to 2 (named as CCCII+2), a new filter which requires only a single CCCII+2 and one grounded capacitor is achieved. In order to operate in current-mode with temperature insensitive, a temperature compensation technique for the CCCII is also proposed. The experimental and PSPICE simulation results found in a good agreement with theoretical analysis are included.
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Electronically tunable current-mode high-order ladder low-pass filters based on CMOS technology
(2015-01-01)
Kunto, Terdsak
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Prommee, Pipat
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Abuelma'atti, Muhammad Taher
This paper describes the design of current mode low-pass ladder filters based on CMOS technology. The filters are derived from passive RLC ladder filter prototypes using new CMOS lossy and lossless integrators. The all-pole and Elliptic approximations are used in the proposed low-pass filter realizations. The proposed two types of filter can be electronically tuned between 10 kHz and 100 MHz through bias current from 0.03 μA to 300 μA. The proposed filters use 1.5 V power supply with 3 mW power consumption at 300 μA bias current. The proposed filters are resistorless, use grounded capacitors and are suitable for further integration. The total harmonic distortion (THD) of the low-pass filters is less than 1% over the operating frequency range. PSPICE simulation results, obtained by using TSMC 0.18μm technology, confirm the presented theory.
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Split-current magnetoresistor
(2013-10-04)
Phetchakul, Toempong
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Taisettavatkul, Prateep
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Yamwong, Wittawat
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Poyai, Amporn
The split-current magnetoresistor is proposed here. The structure likes the series magnetoresistor that one end split into two symmetrical terminals, so it is the magnetoresistor with three terminals. It uses the Hall effect current mode as magnetoresistor but the output is the differential current instead of resistance. It shows good linearity and can detect the magnetic field direction. The sensitivity in the differential current of width 100 μm and length 200 μm at 1 mA is 2.788×10-6 A/T constantly while the conventional one in the differential resistance is varied with magnetic field. It is made of silicon non magnetic material so it is compatible with the modern low-voltage current-mode integrated circuit. © (2013) Trans Tech Publications, Switzerland.
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Low swing CMOS current mode charge pump
(2010-12-01)
Chaisotthee, Sittisak
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Parnklang, Jirawath
This article present the CMOS charge pump circuit which is operated in current mode. MOS transistors in this circuit act as the switches (charge transfer switch) and current source for store the charge from the supply voltage into the fly capacitor and transfer charge from the fly capacitor to the output (output capacitor and resistive load). All of the MOSFET which act as switch operated in saturation and cutoff region. Then the output voltage can be increase because of charge at the fly capacitor which is already pumped up the voltage transfer to output node. This circuit is test in SPICE simulation program by using BSIM3v3 MOSIS 0.35micron model. The supply voltage is 5V. The charge can transfer into fly capacitor (C<inf>fly</inf>) or discharge to load and C<inf>out</inf> by using clock reference to switch the charge transfer switch on/off the MOSFET. Output voltage of this circuit can be increase from the input supply voltage. ©ICROS.
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Current mode automatic gain control
(2008-01-01)
Kasemsuwan, Varakorn
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Arthansiri, Teerawat
This paper presents a current mode automatic gain control (AGC) using a new current mode pseudo exponential-control variable gain amplifier (VGA). The VGA is based on the 4th order Taylor's series approximation to obtain a large control range. The circuit Is designed using CMOS technology and can operate with ± 1 V supply voltages. The control range is 25 dB with the maximum error less than 0.5 dB. The power dissipation is 3 mW.
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A compounded second-generation current conveyor using only NMOS transistors
(2004-09-27)
Pienchob, Patra
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Kumwachara, Kiattisak
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Surakampontorn, Wanlop
In this paper, A CMOS compounded Second-Generation Current Conveyor using only N-Channel MOSFET is introduced. The input stage of the presented circuit consists of Differential amplifier circuit and Current follower circuit and the output stage is Cascode current mirror. This structure provides the high impedance at port Y, Z + and Z -, and a low impedance at port X. Futhermore, using Differential amplifier circuit and Current follower circuit as a voltage to current converter the circuit gives low voltage offset. The performance of the proposed circuit is studied through the PSPICE simulations.

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