scholarly journals A Tunable Low Noise Active Bandpass Filter Using a Noise Canceling Technique

2016 ◽  
Vol 6 (6) ◽  
pp. 1294-1296
Author(s):  
N. Soltani
Keyword(s):  
Power Consumption ◽  
Frequency Shift ◽  
Quality Factor ◽  
Bandpass Filter ◽  
Low Noise ◽  
Center Frequency ◽  
Noise Cancelling ◽  
Circuit Elements ◽  
Circuit Noise ◽  
Noise Canceling

A monolithic tunable low noise active bandpass filter is presented in this study. Biasing voltages can control the center frequency and quality factor. By keeping the gain constant, the center frequency shift is 300 MHz. The quality factor can range from 90 to 290 at the center frequency. By using a noise cancelling circuit, noise is kept lower than 2.8 dB. The proposed filter is designed using MMIC technology with a center frequency of 2.4 GHz and a power consumption of 180 mW. ED02AH technology is used to simulate the circuit elements.

Power Efficient Implementation of Low Noise CMOS LC VCO using 32nm Technology for RF Applications

2018 ◽  
Vol 6 (8) ◽  
pp. 53
Author(s):  
Shitesh Tiwari ◽  
Sumant Katiyal ◽  
Parag Parandkar
Keyword(s):  
Power Consumption ◽  
Phase Noise ◽  
Tuning Range ◽  
Low Voltage ◽  
Performance Comparison ◽  
Low Noise ◽  
Center Frequency ◽  
Voltage Controlled Oscillator ◽  
Low Phase Noise ◽  
Lc Vco

Voltage Controlled Oscillator (VCO) is an integral component of most of the receivers such as GSM, GPS etc. As name indicates, oscillation is controlled by varying the voltage at the capacitor of LC tank. By varying the voltage, VCO can generate variable frequency of oscillation. Different VCO Parameters are contrasted on the basis of phase noise, tuning range, power consumption and FOM. Out of these phase noise is dependent on quality factor, power consumption, oscillation frequency and current. So, design of LC VCO at low power, low phase noise can be obtained with low bias current at low voltage.  Nanosize transistors are also contributes towards low phase noise. This paper demonstrates the design of low phase noise LC VCO with 4.89 GHz tuning range from 7.33-11.22 GHz with center frequency at 7 GHz. The design uses 32nm technology with tuning voltage of 0-1.2 V. A very effective Phase noise of -114 dBc / Hz is obtained with FOM of -181 dBc/Hz. The proposed work has been compared with five peer LC VCO designs working at higher feature sizes and outcome of this performance comparison dictates that the proposed work working at better 32 nm technology outperformed amongst others in terms of achieving low Tuning voltage and moderate FoM, overshadowed by a little expense of power dissipation. 

An Integrated Two-Mode Tunable Channelized Low-Noise Active Filter

2018 ◽  
Vol 27 (06) ◽  
pp. 1850090
Author(s):  
Amin Alahyari ◽  
Massoud Dousti ◽  
Mohammad Bagher Tavakoli
Keyword(s):  
Bandpass Filter ◽  
Impedance Matching ◽  
Low Noise ◽  
Active Filter ◽  
Center Frequency ◽  
Pass Filter ◽  
Filter Output ◽  
Band Stop Filter ◽  
Circuit Input

In this paper, a new structure for an integrated channelized active filter is proposed. This filter can be used as a channelized bandpass filter and again as a channelized band-stop filter. This is fulfilled by using one biasing voltage. In designing a three-channel bandpass filter, a recursive differential structure is used. Moreover, by subtracting bandpass filter output from an all-pass output, the proposed three-channel band-stop filter is achieved. A wideband amplifier plays the role of an all-pass filter. In addition, to decrease the noise of this filter, a noise-canceling circuit is adopted. By using this circuit, input impedance matching is obtained simultaneously. The center frequencies of the two-mode channelized filter are 2, 4 and 6[Formula: see text]GHz. In each of them, the center frequency is controlled via two biasing voltages. The maximum center frequency shift is 450[Formula: see text]MHz. For designing the proposed circuit, GaAs 0.15[Formula: see text][Formula: see text]m technology is applied. The occupied area is [Formula: see text][Formula: see text]mm2.

scholarly journals Fully-Integrated Tunable Q-Enhanced Linear Low Noise Amplifier for Wireless Receivers

2020 ◽  
Vol 9 (3) ◽  
pp. 1762-1766
Keyword(s):  
Quality Factor ◽  
Tuning Range ◽  
Low Noise ◽  
Wireless Receivers ◽  
Center Frequency ◽  
Third Order ◽  
Fully Integrated ◽  
Noise Amplifier ◽  
Quality Factor Q ◽  
Peak Gain

This paper presents the design of a fully-integrated tunable Q-enhanced LNA resonator filter designed to tune the circuit center frequency and quality factor Q. The proposed circuit achieves a 600 MHz 3dB bandwidth tunable center frequency at 2.4 GHz with a 5.5 dB Quality Factor Q tuning range. The proposed circuit utilize a distortion transistor compensator to improve linearity of the circuit. The results show an 18 dBc of third order intermodulation IM3 cancellation. The overall proposed circuit peak gain is 16.5 dB and the minimum NF is 0.94 dB at 2.4 GHz frequency with power consumption of 5.2 mA

TUNABLE ACTIVE FILTERS FOR RF AND MICROWAVE APPLICATIONS

2014 ◽  
Vol 23 (06) ◽  
pp. 1450088 ◽  
Author(s):  
LEONARDO PANTOLI ◽  
VINCENZO STORNELLI ◽  
GIORGIO LEUZZI
Keyword(s):  
Power Consumption ◽  
Power Supply ◽  
Bandpass Filter ◽  
Dynamic Range ◽  
Low Voltage ◽  
Supply Voltage ◽  
Active Filters ◽  
Center Frequency ◽  
Power Supply Voltage ◽  
Microwave Applications

In this paper, we present a low-voltage tunable active filter for microwave applications. The proposed filter is based on a single-transistor active inductor (AI), that allows the reduction of circuit area and power consumption. The three active-cell bandpass filter has a 1950 MHz center frequency with a -1 dB flat bandwidth of 10 MHz (Q ≈ 200), a shape factor (30–3 dB) of 2.5, and can be tuned in the range 1800–2050 MHz, with constant insertion loss. A dynamic range of about 75 dB is obtained, with a P1dB compression point of -5 dBm. The prototype board, fabricated on a TLX-8 substrate, has a 4 mW power consumption with a 1.2 V power supply voltage.

scholarly journals Design and Synthesis of Multi-Mode Bandpass Filter for Wireless Applications

Electronics ◽  
2021 ◽  
Vol 10 (22) ◽  
pp. 2853
Author(s):  
Satheeshkumar Palanisamy ◽  
Balakumaran Thangaraju ◽  
Osamah Ibrahim Khalaf ◽  
Youseef Alotaibi ◽  
Saleh Alghamdi
Keyword(s):  
Quality Factor ◽  
Bandpass Filter ◽  
Center Frequency ◽  
Impedance Bandwidth ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Coaxial Cavity ◽  
Wireless Applications ◽  
Design And Synthesis ◽  
Band Pass

In this paper, a compact bandpass filter with improved band stop and band pass characteristics for wireless applications is built with four internal conductive poles in a single resonating cavity, which adds novel quad-resonating modes to the realization of band pass filter. This paper covers the design and testing of the S-band combline coaxial cavity filter which is beneficial in efficient filtering functions in wireless communication system design. The metallic cavity high Q coaxial resonators have the advantages of narrowband, low loss, better selectivity and high potential for power handling, as compared to microstrip filter in the application to determine the quality factor of motor oils. Furthermore, the tuning of coupling screws in the combline filter allows in frequency and bandwidth adjustments. An impedance bandwidth of 500 MHz (fractional bandwidth of 12.8%) has been achieved with an insertion loss of less than 2.5 dB and return loss of 18 dB at the resonant frequency. Four-pole resonating cavity filters have been developed with the center frequency of 4.5 GHz. Insert loss at 0 dB and estimated bandwidth at 850 MHz and a quality factor of 4.3 for the band pass frequencies between 4 and 8 GHz is seen in the simulated result.

A Second Differential Bandpass Filter with Tuning Center Frequency and Constant Q

2015 ◽  
Vol 645-646 ◽  
pp. 646-652
Author(s):  
Yan Xiao Zhao ◽  
Wan Rong Zhang ◽  
Hong Yun Xie ◽  
Xin Huang ◽  
Liang Hao Zhang
Keyword(s):  
Quality Factor ◽  
Bandpass Filter ◽  
Bias Current ◽  
Second Order ◽  
Effective Resistance ◽  
Center Frequency ◽  
Active Inductor ◽  
Design Technique ◽  
Output Impedance ◽  
Sige Hbt

A second order differential filter with Q-enhancement and tunable active inductor is presented. The design technique for a tunable Q-enhancement SiGe HBT active inductor operating in the wide RF-band for the filter is described. Multi-regulated Cascode circuit is employed to enhance the quality factor Q by increasing the output impedance. Tunable active resistor is introduced to boost the tuning ability of the active inductor. Employing the proposed active inductor, the center frequency of the filter is tuned in the frequency of 1.05~2.45GHz by adjusting the bias current, Q reducing with different bias current can be compensated via tuning the feedback effective resistance of the active inductor, and Q has almost constant value of 209~225 at the frequency of 2.15GHz.

An Ultra-Wideband 0.1–6.1 GHz Low Noise Amplifier in 180 nm CMOS Technology

2020 ◽  
pp. 2150104
Author(s):  
Farshad Shirani Bidabadi ◽  
Sayed Vahid Mir-moghtadaei
Keyword(s):  
Power Consumption ◽  
Cmos Technology ◽  
Low Noise ◽  
Low Noise Amplifier ◽  
Ultra Wideband ◽  
Common Source ◽  
Power Gain ◽  
Noise Cancelling ◽  
Resistive Feedback ◽  
Noise Amplifier

In this paper, an Ultra-Wideband (UWB) low noise amplifier (LNA) with low power consumption and high-power gain in 180[Formula: see text]nm CMOS technology is presented. An innovative combination of conventional methods to design UWB-LNA, i.e., resistive-feedback, inductive-series peaking, noise cancelling and inductive degeneration techniques is described here. The proposed LNA consists of two common source amplifiers with resistive feedback in which the noise and power consumption have been reduced by using the noise cancelling and current reuse techniques, respectively. Also, resistive feedback in the first stage reduces input resistance, hereby improving input impedance matching. In the second stage, which is used to increase the power gain, a common source structure with inductive-series peaking and noise cancellation techniques is used. The analytical results agree well with the post layout simulation results. The post-layout simulation shows a gain of [Formula: see text][Formula: see text]dB and noise figure (NF) of 2.3[Formula: see text]dB in the whole [Formula: see text][Formula: see text]dB bandwidth of 0.1[Formula: see text]GHz to 6.1[Formula: see text]GHz, while the S11 and S22 are less than [Formula: see text][Formula: see text]dB. The proposed circuit has a figure of merit of 9.9 which is significantly improved compared to the previous works. The total power dissipation is only 7.3[Formula: see text]mW, and the active area is less than 0.7[Formula: see text]mm2.

A NEW SWITCHED OPAMP APPROACH FOR IMPROVING THE OPERATION OF AUTO-RESET SWITCHED-CAPACITOR FILTERS

2011 ◽  
Vol 20 (05) ◽  
pp. 835-848 ◽  
Author(s):  
MOHAMMAD RASHTIAN ◽  
OMID HASHEMIPOUR ◽  
KEIVAN NAVI ◽  
ALI JALALI
Keyword(s):  
Power Consumption ◽  
Quality Factor ◽  
Second Order ◽  
Considerable Reduction ◽  
Center Frequency ◽  
Switched Capacitor ◽  
Band Pass Filter ◽  
Pass Filter ◽  
Band Pass ◽  
Switched Capacitor Filters

In this paper, a new switched opamp is presented in order to improve the operation of auto-zeroed switched capacitor circuit. This approach results in a considerable reduction in power consumption and a moderate speed improvement. Based on the above improvement, a second-order band-pass filter with a center frequency of 833 kHz and quality factor of 8 is realized and compared with previous works. The proposed switched opamp is also utilized in the structure of a novel z to -z2 block for the design of pseudo two-path band-pass filters. A second-order pseudo two-path band-pass filter with the same specification of the previous work is designed, simulated, and compared.

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