scholarly journals Current-mode techniques for UWB frequency synthesizers

2021 ◽  
Author(s):  
Dominic DiClemente
Keyword(s):  
Frequency Tuning ◽  
Wide Band ◽  
Current Mode ◽  
Frequency Synthesizers ◽  
Ultra Wide Band ◽  
Phase Locked Loops ◽  
Active Inductor ◽  
Switched Capacitors ◽  
Active Inductors ◽  
Step Down

This thesis deals with current-mode techniques for ultra-wide band applications. An overview of ultra-wide band (UWB) wireless communications is presented. Two standards for UWB data communications, namely direct-synthesis UWB (DS-UWB) and Multi-band orthogonal frequency division multiplexing (MB-OFDM) UWB are presented. MB-OFDM UWB devices must hop among 14 UWB channels within 9.5 ns, imposing stringent constraints on design of frequency synthesizers. A review of the state-of-the-art frequency synthesizers for MB-OFDM UWB applications is provided. Current-mode phase-locked loops with active inductors and active transformers employed in both loop filters and voltage-controlled oscillators are proposed and their performance in analyzed. Current-mode phase-locked loops decouple the PLL dynamic range from the scaling down of the supply voltage. An active-inductor VCO with both coarse and fine frequency adjustment, a hybrid VCO with a step-down passive transformer loaded with an active inductor, and a hybrid VCO with a step-down passive transformer with a varactor are proposed and their performances are analyzed. These VCOs obtain wide frequency tuning ranges without relying on switched back networks. To meet the timing constraint of UWB frequency synthesizers, Current-mode techniques are further developed for UWB frequency synthesizers. An active inductor with a bank of switched capacitors is proposed to provide fast locking. The bank of switched capacitors eliminates the frequency acquisition locking time of the frequency synthesizer, allowing 9.5 ns phase locking time. The proposed current-mode phase-locked loops, active-inductors oscillators and hybrid oscillators were designed and implemented in TSMC-0.18 μm and IBM-0.13 μm CMOS technologies.

scholarly journals Current-mode techniques for UWB frequency synthesizers

2021 ◽  
Author(s):  
Dominic DiClemente
Keyword(s):  
Frequency Tuning ◽  
Wide Band ◽  
Current Mode ◽  
Frequency Synthesizers ◽  
Ultra Wide Band ◽  
Phase Locked Loops ◽  
Active Inductor ◽  
Switched Capacitors ◽  
Active Inductors ◽  
Step Down

This thesis deals with current-mode techniques for ultra-wide band applications. An overview of ultra-wide band (UWB) wireless communications is presented. Two standards for UWB data communications, namely direct-synthesis UWB (DS-UWB) and Multi-band orthogonal frequency division multiplexing (MB-OFDM) UWB are presented. MB-OFDM UWB devices must hop among 14 UWB channels within 9.5 ns, imposing stringent constraints on design of frequency synthesizers. A review of the state-of-the-art frequency synthesizers for MB-OFDM UWB applications is provided. Current-mode phase-locked loops with active inductors and active transformers employed in both loop filters and voltage-controlled oscillators are proposed and their performance in analyzed. Current-mode phase-locked loops decouple the PLL dynamic range from the scaling down of the supply voltage. An active-inductor VCO with both coarse and fine frequency adjustment, a hybrid VCO with a step-down passive transformer loaded with an active inductor, and a hybrid VCO with a step-down passive transformer with a varactor are proposed and their performances are analyzed. These VCOs obtain wide frequency tuning ranges without relying on switched back networks. To meet the timing constraint of UWB frequency synthesizers, Current-mode techniques are further developed for UWB frequency synthesizers. An active inductor with a bank of switched capacitors is proposed to provide fast locking. The bank of switched capacitors eliminates the frequency acquisition locking time of the frequency synthesizer, allowing 9.5 ns phase locking time. The proposed current-mode phase-locked loops, active-inductors oscillators and hybrid oscillators were designed and implemented in TSMC-0.18 μm and IBM-0.13 μm CMOS technologies.

scholarly journals Feasibility of Tunable Amplifier and Bandpass Filter for Mobile Handsets Using Active Inductor Circuits

2002 ◽  
Vol 25 (4) ◽  
pp. 307-319
Author(s):  
J. Rodriguez Tellez ◽  
N. T. Ali ◽  
B. Majeed
Keyword(s):  
Tuning Range ◽  
Bandpass Filter ◽  
Frequency Tuning ◽  
Low Cost ◽  
Active Inductor ◽  
Noise Power ◽  
Gaas Mesfet ◽  
Active Inductors ◽  
Mobile Handset ◽  
Tuning Function

In this paper active inductor circuits are employed to assess their suitability for providing a tuning function in GaAs MMIC circuits. The specifications for a mobile handset amplifier and a bandpass filter operating from a 3 V supply rail are used as test vehicles. The design and simulation of the circuits employs a low-cost commercially available low pinch-off GaAs MESFET process. The suitability of active inductors for tuning in such applications considers issues such as frequency tuning range, noise, power consumption and stability.

scholarly journals Active Inductor based Low Noise Amplifier for Ultra Wide Band Receiver

2012 ◽  
Vol 41 (15) ◽  
pp. 53-60
Author(s):  
V. Vaithianathan ◽  
R. Srinivasan ◽  
J. Raja ◽  
M. Chandra Praveen
Keyword(s):  
Wide Band ◽  
Low Noise ◽  
Low Noise Amplifier ◽  
Ultra Wide Band ◽  
Active Inductor ◽  
Noise Amplifier

scholarly journals Ultra-Wide Band LNA Design using Active Inductor with Modified Noise Cancellation Technique

2019 ◽  
Vol 8 (2) ◽  
pp. 2406-2410
Keyword(s):  
Noise Figure ◽  
Supply Voltage ◽  
Wide Band ◽  
Low Noise ◽  
Ultra Wide Band ◽  
Active Inductor ◽  
Cmos Process ◽  
Chip Area ◽  
Chip Size ◽  
Lna Design

An Ultra-Wide Band (UWB) Low Noise Amplifier (LNA) is affective in deciding the chip size and in the implementation cost at Radio Frequency applications. The proposed LNA design with an active inductor is a different solution to trounce the habit of passive inductors to cut the chip area. Designed in 90-nm CMOS process, a voltage gain of 9dB to 15.5dB for a supply voltage of 0.9v to 1.8V with a smallest Noise Figure (NF) of 5.7dB is achieved by the LNA, with low power utilization and at 2.40 GHz, with 345um2 of chip area.

scholarly journals Current-mode CMOS Active Inductor with Applications to Low-Voltage Oscillators

2013 ◽  
Vol 3 (6) ◽  
pp. 540-543
Author(s):  
M. Ma ◽  
Z. Li ◽  
Z. Yao
Keyword(s):  
Negative Feedback ◽  
Power Supply ◽  
Low Voltage ◽  
Current Mode ◽  
Active Inductor ◽  
Transistor Structure ◽  
Current Mirrors ◽  
Active Inductors ◽  
A Current

This paper investigates a current mode active inductor. In the proposed active inductor, three current mirrors have been connected to each other to realize the negative feedback. This active conductor has a two layer transistor structure. A 4.257 GHz, 1.2-V power supply non-inductive LC negative resistor oscillator, base on two of the proposed active inductors, is demonstrated.

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