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0.5 V Universal Filter and Quadrature Oscillator Based on Multiple-Input DDTA
(2023-01-01)
Kumngern, Montree
;
Khateb, Fabian
;
Kulej, Tomasz
This paper presents a universal voltage-mode filter and quadrature oscillator based on low-voltage multiple-input differential difference transconductance amplifier (MI-DDTA). Unlike the previous published DDTAs, that utilize the bulk-driven (BD) multiple-input MOS transistor technique (MI-MOST) in the differential pair of the first stage only, the proposed DDTA, for the first time, utilize the BD MI-MOST in the second stage of the DDTA. This results in capability of providing more arithmetic operations without additional current branches or power dissipation. Hence, simplify the topology of the filter and oscillator applications, by decreasing the count of active blocks. The voltage-mode filter offers high-input and low-output impedances, and both non-inverting and inverting versions of five types of transfer functions, namely low-pass, high-pass, band-pass, band-stop, and all-pass characteristics. The oscillator offers three-phase of quadrature signals, and orthogonal control of the condition and frequency of oscillations. The circuit was designed in Cadence environment using 180 nm CMOS TSMC technology. The voltage supply is 0.5 V and the power consumption of the filter is 472 nW. The simulation results are in accordance with theory and confirm the performance of the proposed circuit.
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0.3-Volt Rail-to-Rail DDTA and Its Application in a Universal Filter and Quadrature Oscillator
(2022-04-01)
Khateb, Fabian
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Kumngern, Montree
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Kulej, Tomasz
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Biolek, Dalibor
This paper presents the extremely low-voltage supply of the CMOS structure of a differential difference transconductance amplifier (DDTA). With a 0.3-volt supply voltage, the circuit offers rail-to-rail operational capability. The circuit is designed for low-frequency biomedical and sensor applications, and it consumes 357.4 nW of power. Based on two DDTAs and two grounded capacitors, a voltage-mode universal filter and quadrature oscillator are presented as applications. The universal filter possesses high-input impedance and electronic tuning ability of the natural frequency in the range of tens up to hundreds of Hz. The total harmonic distortion (THD) for the band-pass filter was 0.5% for 100 mV<inf>pp</inf> @ 84.47 Hz input voltage. The slight modification of the filter yields a quadrature oscillator. The condition and the frequency of oscillation are orthogonally controllable. The frequency of oscillation can also be controlled electronically. The THD for a 67 Hz oscillation frequency was around 1.2%. The circuit is designed and simulated in a Cadence environment using 130 nm CMOS technology from United Microelectronics Corporation (UMC). The simulation results confirm the performance of the designed circuits.
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Electronically Tunable Universal Filter and Quadrature Oscillator Using Low-Voltage Differential Difference Transconductance Amplifiers
(2022-01-01)
Kumngern, Montree
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Suksaibul, Pichai
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Khateb, Fabian
;
Kulej, Tomasz
This paper presents a new electronically tunable universal filter and quadrature oscillator for low frequency biomedical and biosensor applications employing low-voltage differential difference transconductance amplifier (DDTA). The DDTA CMOS structure uses 0.5 V of supply voltage and consumes 277 nW of power. Unlike the previous universal filters, the proposed filter provides many transfer functions of the standard five transfer functions such as low-pass, high-pass, band-pass, band-stop and all-pass with both unity and controlled voltage gains as well as both inverting and non-inverting transfer functions. The natural frequency and the voltage gain of the five standard transfer functions can be controlled electronically. For the band-pass filter, the third intermodulation distortion (IMD3) was 0.37% for 20 mVpp input signal while the output integrated noise was 61.37 μV. The dynamic range (DR) was 53.27 dB for 1% IMD3. The quadrature oscillator has electronically and orthogonal control of the condition and frequency of oscillation. The proposed circuit and its applications were designed and verified via Cadence simulator tool using 0.13 μm UMC CMOS technology. Further, the circuit was evaluated by PSPICE simulation and experiment test using commercial OTA LM13700.
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Multiple-Input Universal Filter and Quadrature Oscillator Using Multiple-Input Operational Transconductance Amplifiers
(2021-01-01)
Kumngern, Montree
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Khateb, Fabian
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Kulej, Tomasz
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Psychalinos, Costas
This paper presents a new multiple-input single -output voltage-mode universal biquad filter based on multiple-input operational transconductance amplifiers (MI-OTA). This work demonstrates that the multiple-input OTA-based universal filter can provide more filtering responses and other benefits, compared to conventional OTA-based one. The filter provides electronic and orthogonal control of the natural frequency and the quality factor. Furthermore, a two-phase quadrature oscillator can be obtained by slightly modifying the proposed universal filter while the condition and frequency of oscillation can be controlled orthogonally and electronically. The performance of the proposed circuit is evaluated in Cadence environment using the TSMC $0.18~\mu \text{m}$ CMOS technology. The voltage supply is 1.2 V and the power dissipation of the MI-OTA is $24~\mu \text{W}$. For 1% third intermodulation distortion (IMD3) the dynamic range of the band-pass filter is 78.6 dB. In addition, the proposed filter and oscillator are investigated through experiment tests using LM13700 commercially available OTA.
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FDCCII -Based Third-Order Quadrature Sinusoidal Oscillator
(2018-08-20)
Wareechol, Eakluck
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Knobnob, Boonying
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Kumngern, Montree
This paper presents a new mixed-mode third-order quadrature sinusoidal oscillator employing one fully differential second-generation current conveyor (FDCCII), three capacitors and three resistors. The circuit provides two quadrature voltage outputs and two quadrature current outputs into single topology. The condition and frequency of oscillations can be orthogonally controlled. FDCCII-based 0.35±m CMOS process is used to implement and simulate the proposed oscillator.
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Current-Mode Quadrature Qscillator and Universal Filter Using ZC-CCFTAs
(2018-07-02)
Kumngern, Montree
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Knobnob, Boonying
In this paper, a new current-mode quadrature oscillator and universal filter employing two z-copy current controlled current follower transconductance amplifiers (ZC-CCFTAs) and two grounded capacitors is presented. Either a quadrature oscillator or a universal filter can be obtained into single topology. In case the circuit works as a quadrature oscillator, the condition of oscillation and the frequency of oscillation can be orthogonally controlled. In case the circuit works as a universal filter, low-pass, high-pass, band-pass, band-stop and all-pass filters can be simultaneously obtained. SPICE simulations results are presented to verify the validity of proposed circuit, which are consistent with theoretical predictions.
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Quadrature oscillator with independent frequency control using ECCIIs
(2015-01-26)
Kumngern, Montree
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Tuntrakool, Sunti
This paper presents a new mixed-mode quadrature oscillator. The proposed structure employs two electronically tunable second-generation current conveyors, two grounded capacitors and three grounded resistors which is suitable for integrated circuit implementation. Unlike previously oscillators, both the condition of oscillation and the frequency of oscillation of the proposed oscillator can be controlled using resistors and/or current-gain of ECCII. The circuit provides two quadrature current outputs and two quadrature voltage outputs. The current output terminals also possess high-impedance level which can be directly connected to the next stage without additional buffer circuits. PSPICE simulation results are given to confirm the workability of the proposed structure.
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Mixed-mode quadrature oscillator using a single DDCCTA and grounded passive components
(2015-01-01)
Phatsornsiri, Punnavich
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Lamun, Panit
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Kumngern, Montree
A new mixed-mode quadrature oscillator using a single differential difference current conveyor transconductance amplifier (DDCCTA), two grounded resistors, and two grounded capacitors is presented. The proposed circuit provides both quadrature voltage and quadrature current outputs simultaneously. The condition of oscillation (CO) and frequency of oscillation (FO) of the circuit are orthogonally controllable. The circuit is beneficial to monolithic integrated circuit implementation by using all grounded passive components. Moreover, the active and passive sensitivities of the proposed configuration are low. The validity of the proposed oscillator has been established by PSPICE simulations using MIETEC 0.5 μm CMOS technology.
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CFTA-based electroniccally tunable quadrature sinusoidal oscillator
(2014-10-15)
Kumngern, Montree
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Lamun, Panit
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Junnapiya, Somyot
This paper presents a new electronically tunable current-mode quadrature sinusoidal oscillator. The proposed oscillator employs only two current follower transconductance amplifiers, one virtually grounded resistor and two grounded capacitors which is advantageous for integrated circuit implementation. The proposed circuit offers the advantages of orthogonal electronic setting for the frequency of oscillation and condition of oscillation, availability of two explicit quadrature current outputs and low sensitivity properties. The outputs of the circuit possess high impedance level which is directly connected to the loads without buffer circuits. PSPICE simulation and experimental results are used to verify the workability of the proposed circuit.
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Current-mode third-order quadrature oscillator using VDTAs and grounded capacitors
(2014-01-01)
Phatsornsiri, Punnavich
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Lamun, Panit
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Kumngern, Montree
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Torteanchai, Usa
This paper presents a novel electronically tunable current-mode third-order quadrature oscillator based on voltage differencing transconductance amplifier (VDTA). The proposed oscillator is constructed using two VDTAs and three grounded capacitors, which is advantageous for integrated circuit implementation. The circuit provides two current outputs with 90° phase difference from high output impedance terminals. The condition of oscillation and the frequency of oscillation can be electronically tuned by adjusting the bias current of the VDTAs. The sensitivity studies of the circuit have been carried out. PSPICE simulations with 0.35 μm TSMC CMOS process parameters are given to confirm the theoretical analysis. © 2014 IEEE.

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