Superregeneration revisited: from principles to current applications

© 2020 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.Wireless communications play a central role in our modern connected lives; at the same time, they constitute a very broad and deep area of research. The elements that make wireless communications possible are a transmitter, which sends information through electromagnetic waves; a medium that is able to transport these waves; and, finally, a receiver, which extracts the information from the-usually very small-amount of energy it is able to collect from the medium.Peer ReviewedPostprint (author's final draft

Исследование влияния флуктуационных и ударных колебаний на чувствительность сверхрегенеративных приемопередающих устройств

Рассматриваются вопросы ударного возбуждения колебательной системы транзисторного сверхрегенеративного приемопередающего устройства в момент запуска импульсами тока для разных законов затухания к и их влияние на чувствительность и усиление в приемном режиме работы, определение условий достижения высокой чувствительности устройства к слабым внешним сигналам на основе анализа флуктуационных колебаний в приемном режиме работы, оценка полосы пропускания входного колебательного контура сверхрегенеративного приемопередатчика при нулевом значении затухания этого контура, а также оценка суммарного воздействия ударных и флуктуационных колебаний на параметры сверхрегенеративного приемопередатчика.

Theoretical Analysis & Practical Implementation of a Super-Regenerative Receiver for Amplitude Modulated Radio Signals

The Super-Regenerative Receiver invented by Edwin Armstrong in 1922 provides simple but effective reception and amplification of modulated radio signals. Despite its age and the increased complexity of communication systems over the years, Super-Regenerative Receivers still find use in various specialized applications due to the simplicity and low-power consumption of the design. This paper aims to provide a thorough mathematical analysis of Super-Regenerative Receivers applied to both a system level model and an electrical band pass circuit while offering a practical implementation for receiving amplitude modulated signals to be compared with simulated results

The Advanced Meteorological Sounding System

In a program sponsored by the Air Force Cambridge Research Laboratories, Motorola has developed an Advanced Meteorological Sounding System (AMSS) for the purpose of measuring meteorological parameters at altitudes up to 150,000 feet. Although some modifications have been made in the current measuring equipment, the techniques used today are still predominantly those used twenty years ago. It was the purpose of the AMSS to update the present system with particular emphasis on improved reliability, decreased operating costs and increased accuracies. As opposed to the present ground based meteorological tracking system, the AMSS provides a smaller and lighter radiosonde, improved ranging and telemetry accuracies, higher data rates including a continuous data channel, unambiguous ranging to 580 kilometers, digitized output data and. a solid state design throughout. Nearly all the techniques applied to the AMSS have been the result of concepts developed on the various space programs and some of the specific items which find application in the meteorological program include high power (30 watts) solid state UHF transmitters, narrow band phase lock receivers, stripline filters, a pseudo random noise ranging system, stable low cost oscillators - both crystal and multivibrator, low cost/low group delay receivers, automatic system acquisition including anti-sideband lock circuitry, PAM/FM telemetry accuracies of better than 0. 25%, and use of integrated circuits. Within this paper is outlined the Advanced Meteorological Sounding System (AMSS) and the use of the above concepts in development of such a system. It is not the intent here to cover these concepts in a rigorous technical manner, but rather outline their use as applied to the AMSS system. The research reported in this paper was sponsored by the Air Force Cambridge Research Laboratories, Office of Aerospace Research, under Contract AF 19(628)- 4215 but the report does not necessarily reflect endorsement by the sponsor

A 24GHz Synchronized Super-regenerative receiver in 65nm CMOS

Questo lavoro presenta il progetto di un ricevitore super-rigenerativo sincronizzato, sviluppato in tecnologia CMOS 65 nm. Il ricevitore adotta una frequenza operativa di 24 GHz ed è progettato per raggiungere una velocità massima di ricezione pari a 2 Gbps, a partire da un minimo di 100 Mbps. La tecnica super-rigenerativa viene impiegata per realizzare un ricevitore a bassa potenza, da utilizzare nella comunicazione a breve distanza (1-10 m), e la simulazione dimostra che, lavorando ad 1 Gbps, il ricevitore manifesta un rendimento energetico di 3.38 pJ/bit. Il diagramma a blocchi del circuito presenta tre blocchi principali: l'LNA, collegato all'antenna, che garantisce un S11 di 19.62 dB a 24 GHz; l'oscillatore super-rigenerativo (SRO), che è il cuore del circuito; e l'oscillatore ad anello che viene utilizzato per generare il segnale di quench che deve pilotare l'SRO. Teoria, metodi di progettazione e risultati ottenuti sono ampliamente illustrati all'interno della Tesi. This work presents the design of a synchronized super-regenerative receiver developed in 65 nm CMOS technology. The receiver is working with an operating frequency of 24 GHz and it is projected to achieve a maximum data bit rate of 2 Gbps, starting from a minimum of 100 Mbps. The super-regenerative technique is used to realize a low power receiver for short-range distance (1-10 m), and the simulation shows that working at 1 Gbps the receiver has an energy efficiency of 3.38 pJ/bit. The block diagram of the circuit presents three main blocks: the LNA (Low-Noise Amplier), connected to the antenna, which guarantees an S11 of 19.62 dB at 24 GHz; the Super-Regenerative Oscillator (SRO), which is the heart of the circuit; and the Ring Oscillator which is used to generate the quench signal that has to drive the SRO. Theory, design methods and final results are fully explained inside the Thesi

Contribución al modelado y diseño de moduladores sigma-delta en tiempo continuo de baja relación de sobremuestreo y bajo consumo de potencia

Continuous-Time Sigma-Delta modulators are often employed as analog-to-digital converters. These modulators are an attractive approach to implement high-speed converters in VLSI systems because they have low sensitivity to circuit imperfections compared to other solutions. This work is a contribution to the analysis, modelling and design of high-speed Continuous-Time Sigma-Delta modulators. The resolution and the stability of these modulators are limited by two main factors, excess-loop delay and sampling uncertainty. Both factors, among others, have been carefully analysed and modelled. A new design methodology is also proposed. It can be used to get an optimum high-speed Continuous-Time Sigma-Delta modulator in terms of dynamic range, stability and sensitivity to sampling uncertainty. Based on the proposed design methodology, a software tool that covers the main steps has been developed. The methodology has been proved by using the tool in designing a 30 Megabits-per-second Continuous-Time Sigma-Delta modulator with 11-bits of dynamic range. The modulator has been integrated in a 0.13-µm CMOS technology and it has a measured peak SNR of 62.5dB