Download PDF by Allen A Sweet B.S. M.S. Ph.D.: Designing Bipolar Transistor Radio Frequency Integrated

By Allen A Sweet B.S. M.S. Ph.D.

ISBN-10: 1596931280

ISBN-13: 9781596931282

ISBN-10: 1596931299

ISBN-13: 9781596931299

Radio frequency built-in circuits (RFICs) are an incredible a part of contemporary instant communications units and infrastructure. An RFIC layout strategy regarding state-of-the-art bipolar applied sciences (GaAs HBT or SiGe HBT) has won reputation between engineers as a result of its skill to maximise functionality; despite the fact that, it's been principally missed in expert reference books. This ebook fills the distance, delivering practitioners an in depth remedy of this more and more very important subject. From discussions of key purposes (Bluetooth, UWB, GPS, WiMax) and architectures...to in-depth insurance of fabrication applied sciences and amplifier design...to a glance at functionality tradeoffs and construction expenditures, this e-book fingers engineers with whole layout information for his or her demanding paintings within the box.

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Additional info for Designing Bipolar Transistor Radio Frequency Integrated Circuits (Artech House Microwave Library)

Sample text

80–87. 4 (ZigBee). 1 I/Q Receivers In today’s wireless communications industry, most systems make use of some form of phase modulation. Phase modulation has been found to be superior to other forms of modulation in terms of supporting high data rates with superior signal-to-noise ratios at high data rates. Given the paramount importance of phase modulation, the RFIC field has had to find circuit techniques to receive and transmit various types of phase modulations. These types of modulations can be compared and contrasted by considering their performance relative to three important criteria: 1.

Of the two, the multiband OFDM approach seems to be gaining wider acceptance. 6 GHz range. The equipment designer is free to use any number of these bands (up to the full fifteen). The highest data rates are achieved by using the maximum number of RF bands. Each RF band itself is divided into a series of QPSK modulated subcarriers multiplexed together according to OFDM techniques. Therefore, there are two types of multiplexing going on simultaneously: multiplexing of the subcarriers within each RF band and multiplexing of the RF bands.

5. Since the number of phase states is now four instead of two, as in the case of BPSK, the bits per clock period associated with QPSK is log2(4) = 2 bits. This means that for the same clock period, the information rate has doubled. Another way to run QPSK is to divide the clock rate by two, which improves spectral efficiency by reducing the spectra’s width by a factor of two while preserving the same data rate associated with BPSK modulation. Either way you look at it, QPSK is a 2:1 improvement relative to BPSK.

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Designing Bipolar Transistor Radio Frequency Integrated Circuits (Artech House Microwave Library) by Allen A Sweet B.S. M.S. Ph.D.


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