Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 19 of 19 for “"LC-Tank"”.
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Performance Comparison of Harmonically Tuned Power Amplifiers at 28 GHz in SiGe BiCMOS
… network is composed of a parallel network (one LC tank in series with an inductor) and a series network (one 3f0-resonance LC tank in series with a capacitor) to create a multi-resonance load network. Class-F-1 load network is composed of a parallel network (two LC tank in series with an …
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Low Phase Noise Oscillator Design. A Design Methodology for Improving Performance: Theoretical Analysis, CAD Simulations, and Prototype Building
… aspects in the design of low phase noise LC-tank CMOS RF oscillators. Novel analytical techniques for estimating the periodic steady-state solution, perturbation-projection vector, and phase noise/timing jitter for oscillators are presented. These techniques enable a quantitative estimate …
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Modelling and applications of MOS varactors for high-speed CMOS clock and data recovery
… different solutions known for this circuit, LC-VCO is acknowledged to have the best phase noise performance, due to the filtering characteristic of the LC tank circuit. We provide details on modelling and characterization of a special type of varactor, the accumulation-mode MOS varactor, used …
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Low-field classroom nuclear magnetic resonance system
… NMR signal. The probe circuit is essentially an LC tank with a tunable resonant frequency. An FPGA is used to produce the excitation pulses and process the received NMR signals. This research has led to the ability to observe Nuclear Magnetic Resonance. 'Spin- Lattice' and 'Spin-Spin' relaxation …
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Harvesting energy from non-ideal vibrations
… impedance matching model. By connecting LC tank circuits to the harvester output, additional resonant frequencies are created thereby enabling the energy harvesting system to effectively harvest energy from multi-harmonic vibration sources. However, the required inductors in the LC tank …
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Analysis and Design of Wide Tuning Range Low Phase Noise mm-wave LC-VCOs
… standards. One of the critical components, the LC-voltage controlled oscillator (LC-VCO), is required to have low phase noise while maintaining wide tuning range to achieve low bit error rates (BERs). Due to the large parasitic capacitance and high losses in silicon based technologies, extending …
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Linearized 4-7 GHz LC Tunable Filter with Active Balun in 0.18um SiGe BiCMOS
… parameters. Prior work has shown tunable LC filters to be advantageous in the microwave regime. A balanced-to-unbalanced (balun) transformation circuit is required to support the differential nature of a tunable LC filter. An active balun that also performs as a transconductor to drive the …
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Switched-Tank VCO Designs and Single Crystal Silicon Contour-Mode Disk Resonators for use in Multiband Radio Frequency Sources
… non-switchable VCOs. This work presents switched-tank voltage controlled oscillators (VCOs) designed in Motorolaà Âs 0.18 à µm HIP6WRF BiCMOS process that could be used in multiband receivers covering the three UNII sub-bands. The first VCO was optimized for low power consumption. The VCO draws a …
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Filter Design for Interference Cancellation for Wide and Narrow Band RF Systems
… depth by using a negative transconductance in an LC tank. A negative feedback is added to the circuit to improve the bandwidth. While implemented in the same process as the band pass filter, it only employs CMOS transistors since it is generally more attractive due to its lower cost and …
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Monolithically integrated MEMS resonators and oscillators in standard IC technology
… 10⁴x smaller footprint, when compared to on-chip LC tank circuits. A new class of truly solid-state, monolithically integrated, GHz-frequencies CMOS-MEMS resonators is presented. No post-processing or special packaging of any kind is required beyond the standard CMOS process. Resonant body …
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A high speed serializer/deserializer design
… power consumption.</p><p>A novel multi-phase LC-ring oscillator was developed to supply a low noise clock to the SerDes. This proposed VCO combined an LC-tank with a ring structure to achieve both wide tuning range (11%) and low phase noise (-110dBc/Hz at 1MHz offset).</p><p>With this …
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Tunable Filters and Interference Rejection System for Interferer Suppression at RF and Microwave Bands
… the performance tradeoffs in conventional LC filters to maximally increase filter reconfigurability in frequency tuning range (2-18 GHz), selectivity (Q=5~100) with superior dynamic range (DR>100 dB) at RF to microwave frequency range [2]. 2. Implementing active notch filter system …
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A 5-6 Ghz Silicon-Germanium Vco With Tunable Polyphase Outputs
… GHz Silicon Germanium (SiGe) inductor-capacitor (LC) tank voltage controlled oscillator (VCO) with tunable polyphase outputs. Circuits were designed and fabricated using the Motorola 0.4 ìm CDR1 SiGe BiCMOS process, which has four interconnect metal layers and a thick copper uppermost bump layer …
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Low Power Adaptive Circuits: An Adaptive Log Domain Filter and A Low Power Temperature Insensitive Oscillator Applied in Smart Dust Radio
… implemented using CMOS transistors instead of LC tank for less chip area and power consumption. The frequency variance with temperature is compensated by the temperature adaptive circuits. Experimental results show that the frequency stability from 5°C to 65°C has been improved 10 times with …
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Circuit and Modeling Solutions for High-Speed Chip-to-Chip Communication
… a combination of AC coupling and a resonant LC tank consisting of on-chip interleaved spiral inductors and a tunable capacitor array. Through adjusting the load capacitance in parallel with the inductors, the center frequency of the filter is tunable over a range of nearly 5GHz. The design …
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Design and Characterization of RFIC Voltage Controlled Oscillators in Silicon Germanium HBT and Submicron MOS Technologies
… VCOs require high-quality factor (Q) tank circuits and reduction of noise from active devices; however, the lack of high-quality monolithic inductors, along with low noise transistors in traditional Si technologies, has been a limiting factor. This thesis presents the design, …
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SiGe BiCMOS RF ICs and Components for High Speed Wireless Data Networks
… process, uses two identical, differential LC-tank VCOs connected such that the two oscillator outputs lock in quadrature to the same frequency. The QVCO designs proposed in this work provide the additional feature of phase-tunability, i.e. the relative phase balance between the quadrature …
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ESD Protected SiGe HBT RFIC Power Amplifiers
… A relatively new technique known as the L-C tank approach was used to protect the RFinput while a standard diode ring approach was used to protect the control line. The protection techniques studied were subsequently extended to a completely protected three-stage PA targeting 1.9 GHz …
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Lithium niobate RF-MEMS oscillators for IoT, 5G and beyond
… stages and a varactor-embedded tunable LC tank. By the bias voltage applied to the varactor, the tank can be tuned to change the closed-loop gain and phase responses of the oscillator so that Barkhausen’s conditions are satisfied for the targeted resonant mode. The tank is designed to …