scholarly journals An Efficient and Novel Design of Loop Filter, Charge Pump and VCO for PLL Using CMOS Technology

2018 ◽  
Vol 7 (3.1) ◽  
pp. 39
Author(s):  
N AshokKumar ◽  
A Kavitha
Keyword(s):  
Energy Charge ◽  
Charge Pump ◽  
Cmos Technology ◽  
Phase Lock Loop ◽  
Loop Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Loop Bandwidth ◽  
Low Pass ◽  
Novel Design

This article presents an occasional energy charge pump, low pass filter and voltage supervised generator for little energy section loop. PLL are generally used for synchronization and regulate of grid- associated power electronic techniques. The article enfolds the whole circuit figure of circle filter, charge pump and voltage restrict oscillator through 1.8v energy stock. This kind uses 0.18um CMOS technology. In recent times, voltage restricted oscillator are employed for phase lock loop. A great viable loop-bandwidth plan method, derivative from a distinct -time PLL model, additional complements the jitter attributes of a PLL previously somewhat evolved via optimizing precisecircuit elements. The expressed system no longer simplest guesstimates the timing jitter of a PLL, but additionally attains the most reliable bandwidth reducing the at the whole PLL jitter.  

scholarly journals An Efficient and Novel Design of Loop Filter, Charge Pump and VCO for PLL Using CMOS Technology

2018 ◽  
Vol 7 (2.20) ◽  
pp. 339
Author(s):  
Dr N.AshokKumar ◽  
Dr A.Kavitha
Keyword(s):  
Energy Charge ◽  
Charge Pump ◽  
Cmos Technology ◽  
Phase Lock Loop ◽  
Loop Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Loop Bandwidth ◽  
Low Pass ◽  
Novel Design

This article presents an occasional energy charge pump, low pass filter and voltage supervised generator for little energy section loop. PLL are generally used for synchronization and regulate of grid- associated power electronic techniques. The article enfolds the whole circuit figure of circle filter, charge pump and voltage restrict oscillator through 1.8v energy stock. This kind uses 0.18um CMOS technology. In recent times, voltage restricted oscillator are employed for phase lock loop. A great viable loop-bandwidth plan method, derivative from a distinct -time PLL model, additional complements the jitter attributes of a PLL previously somewhat evolved via optimizing precisecircuit elements. The expressed system no longer simplest guesstimates the timing jitter of a PLL, but additionally attains the most reliable bandwidth reducing the at the whole PLL jitter.  

THE DIFFERENTIAL DIFFERENCE OPERATIONAL FLOATING AMPLIFIER: NEW CMOS REALIZATIONS AND APPLICATIONS

2009 ◽  
Vol 18 (07) ◽  
pp. 1287-1308 ◽  
Author(s):  
EMAN A. SOLIMAN ◽  
SOLIMAN A. MAHMOUD
Keyword(s):  
Analog Circuits ◽  
Cmos Technology ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Variable Gain Amplifiers ◽  
Variable Gain ◽  
Fully Differential ◽  
Filter Performance ◽  
Low Pass ◽  
Band Pass

This paper presents different novel CMOS realizations for the differential difference operational floating amplifier (DDOFA). The DDOFA was first introduced in Ref. 1 and was used to realize different analog circuits like integrators, filters and variable gain amplifiers. New CMOS realizations for the DDOFA are introduced in this literature. Furthermore the DDOFA is modified to realize a fully differential current conveyor (FDCC). Novel CMOS realizations of the FDCC are presented. The FDCC is used to realize second-order band pass–low-pass filter. Performance comparisons between the different realizations of the DDOFA and FDCC are given in this literature. PSPICE simulations of the overall proposed circuits are given using 0.25 μm CMOS Technology from TMSC MOSIS model and dual supply voltages of ±1.5 V.

Comparison and Analysis on Two Improved Detecting Methods for Harmonics without PLL in Single-Phase Circuit

2011 ◽  
Vol 130-134 ◽  
pp. 3928-3932
Author(s):  
Ju Xia Ding ◽  
Xiu Feng Zhang ◽  
Hua Jun Zhang
Keyword(s):  
Single Phase ◽  
Continuous Process ◽  
Response Speed ◽  
Theoretical Method ◽  
Phase Lock Loop ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Low Pass ◽  
Average Theory ◽  
Detecting Method

In order to reduce the error of the phase lock-loop (PLL) and compensate the delay of the low pass filter on harmonics detection, In the paper, a detecting-method without PLL in single-phase circuit is researched. In this method, the PLL and LPF are omitted, the feedback and average theory are used, so that the problem of detecting accuracy induced by PLL and real-time induced by LPF is solved. It is testified through comparison, analysis and simulation, that both methods can reduce the latency, improve dynamic response speed, the feedback method can reduce the delay in a dynamic, continuous process, while the average theoretical method can reduce the delay quantitatively.

scholarly journals Floating Active Inductor Based Trans-Impedance Amplifier in 0.18 μm CMOS Technology for Optical Applications

Electronics ◽  
2019 ◽  
Vol 8 (12) ◽  
pp. 1547
Author(s):  
Xiangyu Chen ◽  
Yasuhiro Takahashi
Keyword(s):  
Power Dissipation ◽  
Supply Voltage ◽  
Cmos Technology ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Chip Area ◽  
Active Inductors ◽  
Low Pass ◽  
Optical Applications ◽  
Fifth Order

In this paper, a transimpedance amplifier (TIA) based on floating active inductors (FAI) is presented. Compared with conventional TIAs, the proposed TIA has the advantages of a wider bandwidth, lower power dissipation, and smaller chip area. The schematics and characteristics of the FAI circuit are explained. Moreover, the proposed TIA employs the combination of capacitive degeneration, the broadband matching network, and the regulated cascode input stage to enhance the bandwidth and gain. This turns the TIA design into a fifth-order low pass filter with Butterworth response. The TIA is implemented using 0.18 μ m Rohm CMOS technology and consumes only 10.7 mW with a supply voltage of 1.8 V. When used with a 150 fF photodiode capacitance, it exhibits the following characteristics: gain of 41 dB Ω and −3 dB frequency of 10 GHz. This TIA occupies an area of 180 μ m × 118 μ m.

scholarly journals A Compact Planar Low-Pass Filter Based on SRR-Metamateria

2018 ◽  
Vol 8 (6) ◽  
pp. 4972
Author(s):  
Badr Nasiri ◽  
Ahmed Errkik ◽  
Jamal Zbitou ◽  
Abdelali Tajmouati ◽  
Larbi El Abdellaoui ◽  
...  
Keyword(s):  
Cutoff Frequency ◽  
Total Surface Area ◽  
Ring Resonators ◽  
Split Ring ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Attenuation Level ◽  
Low Pass ◽  
Novel Design ◽  
Good Agreement

In this work, a novel design of a Microstrip Low-pass filter based on metamaterial square split ring resonators (SRRs) is proposed. The SRRs has been added to obtain a reduced size and high performances. The filter is designed on an FR-4 substrate having a thickness of 1.6mm, a dielectric constant of 4.4 and loss tangent of 0.025. The proposed low-pass filter is characterized by a cutoff frequency of 2.4 GHz and an attenuation level below than -20dB in the stopband. The LPF is designed, simulated and optimized by using two electromagnetic solvers CST microwave studio and ADS. The computed results obtained by both solvers are in good agreement. The total surface area of the proposed circuit is 18x18mm2 excluding the feed line, its size is miniaturized by 40% compared to the conventional filter. The experimental results illustrate that the filter achieves very good electrical performances in the passband with a low insertion loss of 0.2 dB. Moreover, a suppression level can reach more than 35 dB in the rejected band.

scholarly journals CMOS CDBA-Based Inverse Filter Structure

2020 ◽  
Vol 9 (3) ◽  
pp. 2226-2231
Keyword(s):  
Cmos Technology ◽  
Experimental Results ◽  
Band Pass Filter ◽  
Inverse Filter ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Filter Structure ◽  
Low Pass ◽  
Band Pass ◽  
High Pass

This paper presents a voltage-mode(VM) tunable multifunction inverse filter configuration employing current differencing buffered amplifiers (CDBA). The presented structure utilizes two CDBAs, two/three capacitors and four/five resistors to realize inverse low pass filter (ILPF), inverse high pass filter (IHPF), inverse band pass filter (IBPF), and inverse band reject filter(IBRF) from the same circuit topology by suitable selection(s) of the branch admittances(s). PSPICE simulations have been performed with 0.18µm TSMC CMOS technology to validate the theory. Some sample experimental results have also been provided using off-the-shelf IC AD844 based CDBA.

scholarly journals A CMOS Programmable Fourth-Order Butterworth Active-RC Low-Pass Filter

Electronics ◽  
2020 ◽  
Vol 9 (2) ◽  
pp. 204 ◽  
Author(s):  
Changchun Zhang ◽  
Long Shang ◽  
Yongkai Wang ◽  
Lu Tang
Keyword(s):  
Radio Frequency Identification ◽  
Supply Voltage ◽  
Cutoff Frequency ◽  
Cmos Technology ◽  
Pass Filter ◽  
Low Pass Filter ◽  
Silicon Area ◽  
Fully Differential ◽  
Low Pass ◽  
Low Sensitivity

This paper presents a low-pass filter (LPF) for an ultra-high frequency (UHF) radio frequency identification (RFID) reader transmitter in standard SMIC 0.18 μm CMOS technology. The active-RC topology and Butterworth approximation function are employed mainly for high linearity and high flatness respectively. Two cascaded fully-differential Tow-Thomas biquads are chosen for low sensitivity to process errors and strong resistance to the imperfection of the involved two-stage fully-differential operational amplifiers. Besides, the LPF is programmable in order to adapt to the multiple data rate standards. Measurement results show that the LPF has the programmable bandwidths of 605/870/1020/1330/1530/2150 kHz, the optimum input 1dB compression point of −7.81 dBm, and the attenuation of 50 dB at 10 times cutoff frequency, with the overall power consumption of 12.6 mW from a single supply voltage of 1.8 V. The silicon area of the LPF core is 0.17 mm2.

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