CMOS Implementation of Current Differencing Operational Amplifier and Its Notch Filter Application

2019 ◽  
Vol 29 (08) ◽  
pp. 2050132
Author(s):  
Muhammed Emin Başak
Keyword(s):  
Operational Amplifier ◽  
Process Model ◽  
Active Element ◽  
Harmonic Distortion ◽  
Notch Filter ◽  
Current Mode ◽  
Monte Carlo Analysis ◽  
Cmos Process ◽  
Band Pass Filter ◽  
Pass Filter

Active elements are fundamental circuits for a wide scope of scientific and industrial processes. Many researchers have examined active devices to implement filters, oscillators, rectifiers, and converters. This paper presents the current differencing operational amplifier (CDOA) as an active element, firstly implemented with CMOS transistors. The input part of this circuit is a current differencing unit and the conventional operational amplifier (Op-Amp) pursues it. A new realization of a notch filter consists of CDOA is suggested. Voltage-mode band-pass filter and current-mode notch filter are presented as a different filter applications. Simulation results using TSMC 0.18-[Formula: see text]m CMOS process model are used to verify the theoretical analyses. The sensitivity, noise, total harmonic distortion (THD) and the Monte Carlo analysis have been performed to demonstrate the effectiveness of the proposed active element and notch filter.

The Design of Gm-C Low-Pass Filter for Micromachined Gyroscope

2014 ◽  
Vol 609-610 ◽  
pp. 1072-1076
Author(s):  
Qiu Ye Lv ◽  
Chong He ◽  
Wen Jie Fan ◽  
Yu Feng Zhang ◽  
Xiao Wei Liu
Keyword(s):  
Process Model ◽  
Stop Band ◽  
Cutoff Frequency ◽  
Harmonic Distortion ◽  
Cmos Process ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Simulation Results ◽  
Micromachined Gyroscope

In this Paper, a 4th-Order Low-Pass Gm-C Filter is Presented. for the Design of Operational Tranconductance Amplifier(OTA), it Adopts the Techniques of Current Division and Current Cancellation. these Techniques can Help to Achieve a Low Transconductance Value. for the Architecture of the 4th-Order Gm-C Filter, it Consists of Two Biquads. the Two Biquads are Cascade Connected. the Gm-C Low-Pass Filter has been Implemented under 0.5 μm CMOS Process Model. the Final Simulation Results Show the Cutoff Frequency of the Filter is 100Hz and the Stop-Band Attenuation is Larger than 60dB. the Power Consumption is Lower than 1mW and the Total Harmonic Distortion(THD) is -55dB.

scholarly journals Current Controlled Current Differencing Buffered Amplifier: Implementation and Applications

2004 ◽  
Vol 27 (4) ◽  
pp. 219-227 ◽  
Author(s):  
Sudhanshu Maheshwari ◽  
Iqbal A. Khan
Keyword(s):  
Active Element ◽  
Current Mode ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Current Range ◽  
Current Input ◽  
Band Pass ◽  
Simulation Results ◽  
Definition Of ◽  
Harmonic Distortions

A new four terminal current-controlled active element is introduced, where parasitic resistances at two current input ports are controlled leading to the definition of current-controlled current differencing buffered amplifier. Bipolar implementation and as application current-mode band-pass filter circuits are proposed. Simulation results using real device parameters are included, which show device bandwidth of 35 MHz, low total harmonic distortions, and tuning over a wide current range.

Single Active Element Based Cascadable Band-Pass Filters for Low-Q Applications

2015 ◽  
Vol 24 (05) ◽  
pp. 1550075 ◽  
Author(s):  
Bhartendu Chaturvedi ◽  
Sudhanshu Maheshwari
Keyword(s):  
Integrated Circuit ◽  
Active Element ◽  
Monte Carlo Analysis ◽  
Band Pass Filter ◽  
Passive Components ◽  
Pass Filter ◽  
Band Pass ◽  
The Subject ◽  
The Stability ◽  
Good Agreement

The paper presents new single active element based second order band pass filters. The new circuits use single dual-X current conveyor with buffered output and five passive components. The proposed circuits enjoy the features of high input impedance and low output impedance, which are desirable features for voltage-mode circuits. Circuit operation at high frequencies are verified along with non-ideality and parasitic study. The Monte Carlo analysis is also done which justify good sensitivity performances of the proposed circuits. Routh–Hurwitz's stability test is performed to verify the stability of the proposed circuits. For showing the integration aspect, resistorless band-pass filters are also realized. The proposed low-Q filters are useful for cascading. The feature of cascadability is further utilized by showing an application of fourth-order band-pass filter. The performances of the proposed circuits are depicted through Personal Simulation Program with Integrated Circuit Emphasis (PSPICE) simulations, which show good agreement to theoretical applications. The new circuits are expected to enhance the already existing knowledge on the subject.

scholarly journals New Single VDCC-based Explicit Current- Mode SRCO Employing All Grounded Passive Components

2014 ◽  
Vol 18 (2) ◽  
pp. 81 ◽  
Author(s):  
Dinesh Prasad ◽  
D. R. Bhaskar ◽  
M. Srivastava
Keyword(s):  
Process Model ◽  
Current Mode ◽  
Model Parameters ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Quadrature Oscillator ◽  
Sinusoidal Oscillator ◽  
Low Pass ◽  
Band Pass

This paper proposes a new single resistancecontrolled sinusoidal oscillator (SRCO) which employs only onevoltage differencing current conveyor (VDCC), two groundedresistors and two grounded capacitors. The presented circuitconfiguration offers the following advantageous features (i)explicit current-mode output with independent control ofcondition of oscillation (CO) and frequency of oscillation (FO) (ii)low active and passive sensitivities and (iii) a very good frequencystability. The proposed structure can also be configured as (a)trans-admittance low pass filter and band pass filter and (b)quadrature oscillator. The validity of the proposed SRCO,quadrature oscillator and trans-admittance low pass filter andband pass filter has been verified by PSPICE simulations usingTSMC CMOS 0.18μm process model parameters.

scholarly journals Resistorless Current-Mode First-Order All-Pass Filter with Electronic Tuning Employing Low-Voltage CBTA and Grounded Capacitor

2017 ◽  
Vol 27 (02) ◽  
pp. 1850031 ◽  
Author(s):  
Norbert Herencsar ◽  
Jaroslav Koton ◽  
Abhirup Lahiri ◽  
Umut E. Ayten ◽  
Mehmet Sagbas
Keyword(s):  
Low Voltage ◽  
Current Mode ◽  
Monte Carlo Analysis ◽  
Superior Performance ◽  
Sensitivity Analyses ◽  
Cmos Process ◽  
Pass Filter ◽  
First Order ◽  
Transconductance Amplifier ◽  
Electronic Tuning

In this paper, a new realization of a current-mode first-order all-pass filter (APF) using a single active building block (ABB) and one grounded capacitor is presented. As the ABB, the current backward transconductance amplifier (CBTA) is used, which is one of the most recently reported active elements in the literature. The theoretical results are in detail verified by numerous SPICE simulations using a new low-voltage implementation of CBTA. In the design, the PTM 90[Formula: see text]nm level-7 CMOS process BSIM3v3 parameters with [Formula: see text]0.45[Formula: see text]V supply voltages were used. The proposed resistorless CBTA-C APF provides easy electronic tuning of the pole frequency in the frequency range from 763[Formula: see text]kHz to 17.6[Formula: see text]MHz, which is more than one decade. Maximum power dissipation of the circuit is 828[Formula: see text][Formula: see text]W at bias current 233[Formula: see text][Formula: see text]A. Nonideal, parasitic effects, sensitivity analyses, temperature and noise variation, current swing capability, and Monte Carlo analysis results are also provided. Compared to prior state-of-the-art works, the proposed CBTA-C APF has achieved the highest figure of Merit value, which proves its superior performance.

DX-MOCCII Based Fully Cascadable Second Order Current-Mode Universal Filter

2018 ◽  
Vol 27 (07) ◽  
pp. 1850113 ◽  
Author(s):  
Ashok Kumar ◽  
Sajal K. Paul
Keyword(s):  
Notch Filter ◽  
Current Mode ◽  
Second Order ◽  
Current Conveyors ◽  
Band Pass Filter ◽  
Universal Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Band Pass ◽  
Circuit Configuration

The paper presents a new second-order single input multiple output (SIMO) type current mode (CM) universal filter. The proposed circuit uses two dual-X second generation multi-output current conveyors (DX-MOCCII), two grounded capacitors and three grounded resistors. The circuit configuration realizes low-pass filter (LPF), high-pass filter (HPF), band-pass filter (BPF), notch filter (NF) and all-pass filter (APF) responses simultaneously at different output terminals. The new circuit enjoys the features of low input impedance and high output impedance, which is desirable and useful for cascadability in CM circuits. For realizing the universal filter responses, the proposed circuit configuration does not require matching constraint of passive components and both active and passive sensitivities are found low. In addition, the extension of the proposed circuit as a resistorless universal filter has also been presented. As an application of the proposed filter, inverting band pass output is connected to a negative unity gain current follower in a close loop to design voltage and CM multiphase sinusoidal oscillators (MSOs). Comparison of the proposed configuration with available literature is given. The PSPICE simulation of the filter and its application as MSO are performed to verify the agreement with the theoretical proposition.

scholarly journals Wideband Reconfigurable Integrated Low-Pass Filter for 5G Compatible Software Defined Radio Solutions

Electronics ◽  
2021 ◽  
Vol 10 (6) ◽  
pp. 734
Author(s):  
Karolis Kiela ◽  
Marijan Jurgo ◽  
Vytautas Macaitis ◽  
Romualdas Navickas
Keyword(s):  
Software Defined Radio ◽  
Dynamic Range ◽  
Noise Figure ◽  
Harmonic Distortion ◽  
Cmos Process ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Filter Performance ◽  
Low Pass ◽  
Bandwidth Tuning

This article presents a wideband reconfigurable integrated low-pass filter (LPF) for 5G NR compatible software-defined radio (SDR) solutions. The filter uses Active-RC topology to achieve high linearity performance. Its bandwidth can be tuned from 2.5 MHz to 200 MHz, which corresponds to a tuning ratio of 92.8. The order of the filter can be changed between the 2nd, 4th, or 6th order; it has built-in process, voltage, and temperature (PVT) compensation with a tuning range of ±42%; and power management features for optimization of the filter performance across its entire range of bandwidth tuning. Across its entire order, bandwidth, and power configuration range, the filter achieves in-band input-referred third-order intercept point (IIP3) between 32.7 dBm and 45.8 dBm, spurious free dynamic range (SFDR) between 63.6 dB and 79.5 dB, 1 dB compression point (P1dB) between 9.9 dBm and 14.1 dBm, total harmonic distortion (THD) between −85.6 dB and −64.5 dB, noise figure (NF) between 25.9 dB and 31.8 dB and power dissipation between 1.19 mW and 73.4 mW. The LPF was designed and verified using 65 nm CMOS process; it occupies a 0.429 mm2 area of silicon and uses a 1.2 V supply.

Adaptive Notch Filter Based Active Damping Control for Grid-Connected Inverter

2014 ◽  
Vol 986-987 ◽  
pp. 1169-1172
Author(s):  
Ping Wang ◽  
Meng Meng Cai
Keyword(s):  
Notch Filter ◽  
Active Damping ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Adaptive Notch Filter ◽  
Attenuation Characteristic ◽  
Damping Control ◽  
Grid Impedance ◽  
Grid Connected Inverter ◽  
Active Damping Control

The LCL filter is widely applied as interface between grid-connected inverter and grid due to the preferable high frequency attenuation characteristic. Under the condition of weak grid, impedance value of grid model cannot be ignored, the existence of grid impedance results in different LCL resonant frequencies, which will arise challenges of traditional active damping control. Based on the analysis of band pass filter using active damping control strategy, an adaptive active damping control is proposed in this paper by introducing the application of active notch filter, which can adjust the position of negative resonance point adaptively so as to manage sudden grid changes. Theoretical analysis and simulation results presented on the platform of grid-connected PV inverter system indicate the effectiveness and adaptability of this active damping strategy.

scholarly journals Analysis and Simulation of Active Filters Using Operational Transconductance Amplifier (OTA)

2017 ◽  
Vol 13 (15) ◽  
pp. 170
Author(s):  
Haitham K. Ali ◽  
Jihan S. Abdaljabar
Keyword(s):  
Cutoff Frequency ◽  
Current Mode ◽  
High Gain ◽  
Angular Frequency ◽  
Active Filters ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Large Bandwidth ◽  
High Output Impedance

As the transistors are continuously scaling down, it becomes necessary to reduce voltage supply and power requirements of the circuit to increase its performance and stability. Whereas, current- mode devices require less number of stages with high output impedance results in improved performance and large bandwidth as compared to voltage-mode techniques. OTA are current-mode device that takes voltage as input and produces current as output with high gain and large bandwidth. The frequency bands were parameters were determined such as the cutoff frequency (fc), the band width (BW), the quality factor (Q), and the angular frequency (Wo). In this paper the design and the simulation of the transfer function has been done by using (MATLAB) in order to obtain the frequency response for all types of filter (the low pass filter, high pass filter, band pass filter and band stop filter).

Sign in / Sign up

Export Citation Format

Share Document