By Olivier Jamin
This publication discusses the trade-offs enthusiastic about designing direct RF digitization receivers for the radio frequency and electronic sign processing domain names. A system-level framework is constructed, quantifying the appropriate impairments of the sign processing chain, via a accomplished system-level research. distinctive concentration is given to noise research (thermal noise, quantization noise, saturation noise, signal-dependent noise), broadband non-linear distortion research, together with the influence of the sampling method (low-pass, band-pass), research of time-interleaved ADC channel mismatches, sampling clock purity and electronic channel choice. The system-level framework defined is utilized to the layout of a cable multi-channel RF direct digitization receiver. An optimal RF sign conditioning, and a few algorithms (automatic achieve keep an eye on loop, RF front-end amplitude equalization keep watch over loop) are used to chill the necessities of a 2.7GHz 11-bit ADC.
A two-chip implementation is gifted, utilizing BiCMOS and 65nm CMOS procedures, including the block and system-level dimension effects. Readers will enjoy the suggestions awarded, that are hugely aggressive, either by way of rate and RF functionality, whereas vastly decreasing energy consumption.
Read Online or Download Broadband Direct RF Digitization Receivers PDF
Best circuits books
An extraordinary investigate the elemental physics, chemistry, and expertise in the back of the liquid crystal display so much significantly used for desktop displays, televisions, and cell phones, LCDs (liquid crystal screens) are a pervasive and more and more fundamental a part of our lives. offering either an ancient and a business-minded context, this large source describes the original clinical and engineering suggestions used to create those attractive, smart, and eminently necessary units.
A radical and concise therapy of ESDRecognizing its methodic, step by step assault of the electrostatic discharge (ESD) challenge, the preliminary free up of this ebook was once quoted via experts as "the so much thorough and concise remedy of the extensive ESD continuum that's on hand. " Now in its 3rd variation, this e-book supplies an identical relied on insurance of the subject whereas additionally incorporating fresh technological advances that experience taken position within the engineering neighborhood.
Whilst microelectronic units changed vacuum tubes, it marked a revolution in electronics that opened the best way to the pc age. we're at the verge of witnessing one other both profound shift. As molecular units substitute semiconductors, we are going to in achieving new degrees of functionality, performance and power that may highly impression electronics, in addition to sign processing and computing.
This publication information an technique for recognition of the sphere decomposition proposal. The e-book offers the tools in addition to concepts and systems for constructing electrical laptop circuit-loops and opting for their parameters. The tools built were learned utilizing the types of machines with laminated and good rotor having classical constitution.
- A First Lab in Circuits and Electronics
- Circuits for the MRCPCH
- An Introduction to Mixed-Signal IC Test and Measurement (Oxford Series in Electrical and Computer Engineering (Hardco)
- Simulation Techniques and Solutions for Mixed-Signal Coupling in Integrated Circuits (The Springer International Series in Engineering and Computer Science)
- Analog Circuits Cookbook
- Look-Ahead Based Sigma-Delta Modulation (Analog Circuits and Signal Processing)
Additional resources for Broadband Direct RF Digitization Receivers
28 1 RF Receiver Architecture State of the Art Digital Channel filters Digital Mulitpliers I1 Bandselect filter LNA Mixer BPF VGA Sampler Q1 ADC 0Њ 90Њ NCO 1 To demodulator Numericallycontrolled oscillator I2 LO Q2 To demodulator 0Њ 90Њ NCO 2 Fig. 4 Digital-IF Receiver In digital IF receivers (Fig. 38), a digital down-converter replaces the second downconversion stage of a dual-heterodyne receiver. This is made possible by the digitization of the first IF and complex digital down-converters. As the IF is relatively high, this configuration can be designed multi-standard, and it has the potential to perform the simultaneous reception of multiple channels with a single receiver (with multiple parallel DDCs), therefore providing a low-power and low-cost implementation, without image rejection concern since the full analog path is real.
Left: RF signal. Right: IF signal However, the IF frequency shift has one drawback: as the channel lying at the image frequency can be much higher than the wanted channel, requirements on low-IF image rejection are much higher than on homodyne receivers. This issue can be alleviated by the use of a double-quadrature mixer. In case of digital I/Q signal path, this can also be mitigated using DSP techniques . References [37–40] show broadband low-IF implementations for highperformance cable and terrestrial TV receivers.
9) where Δ is the step size of the quantizer. The input signals, output signals, and quantization errors are illustrated in Fig. 10, both in case of a ramp and sine wave input signals. 48 2 System-Level Design Framework for Direct RF Digitization RX x[n] y[n] eq[n] Fig. 11) A useful model of a quantizer is depicted in Fig. 11. The model is exact if e[n] is known. However, in most cases, e[n] is not known, because of input signal complexity, and a statistical model based on Fig. 11 must be adopted.