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Consumer Electronics, IEEE Transactions on

Issue 2 • Date May 1988

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Displaying Results 1 - 15 of 15
  • Feedforward compensation of the amplifier output stage for improved stability with capacitive loads

    Page(s): 334 - 338
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (356 KB)  

    It is pointed out that the stability margin of an audio power amplifier is reduced by a pole in the loop-gain transfer function caused by shunt capacitance in the loudspeaker load. The problem is most severe in amplifiers with output stages that have a high output impedance before feedback. Because MOSFET devices can have an output impedance that is much higher than BJT (bipolar junction transistor) devices, amplifiers with MOSFET output stages are particularly susceptible to load-induced oscillations. A feedforward frequency compensation technique is described that bypasses the pole in the output stage caused by the load capacitance for improved stability of the amplifier View full abstract»

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  • Quasi-digital NTSC color bar generator

    Page(s): 310 - 317
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (388 KB)  

    An NTSC color bar generator is described that consists of a simple, low-cost quasidigital circuit. The generator includes a master oscillator, signal divider circuitry, a luminance generator, a delay circuit, and a burst generator. The measured performance shows a differential gain of 3%, a differential phase of 4°, and a linearity of less than 2.8% View full abstract»

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  • Implementation of digital IC functions with pass transistor switching circuits

    Page(s): 318 - 320
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (196 KB)  

    The author implements a modified Karnaugh map minimization procedure for pass transistors. The savings in silicon area depends on the transistor count as well as the interconnect structure. Examples demonstrate that considerable savings in silicon area can be achieved by using pass logic instead of gate logic. The savings amount to an 80% reduction in silicon area for NMOS and 6% reduction for CMOS. This means that more die can be fabricated on a silicon wafer, leading to a reduction in product development costs View full abstract»

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  • An enhanced RF television scrambling system using phase modulation

    Page(s): 302 - 309
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (628 KB)  

    A novel system for scrambling and descrambling RF television signals for CATV service security is presented. The system has been designed to be low cost, easily manufactured, reliable, and more secure than conventional RF technology. The system uses RF carrier phase modulation to enhance the economy of the RF sync suppression techniques with some of the video and audio signal security attributes of baseband systems. Surface-acoustic-wave filters are used to implement the modulation. The encoding system provides a means of reliable, noise-insensitive addressable data communication to subscribers' descramblers without the use of a separate data channel View full abstract»

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  • A GaAs RF amplifier IC for UHF TV tuners

    Page(s): 366 - 371
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (400 KB)  

    The design and performance of a monolithic GaAs RF amplifier IC with a bias circuit, for application in UHF TV/VTR tuners, are presented. This IC can reduce the area of an RF amplifier to less than half of the size of a conventional amplifier. It has a sufficiently wide range of variation in sheet resistance and threshold voltage to obtain a satisfactory yield. The noise figure of the TV tuner using the present IC is lower than that of the conventional tuner by more than 1.5 dB. Excellent crossmodulation characteristics are obtained at the same time View full abstract»

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  • High frequency noise power spectrum, impedance and transmission loss of power line in Japan on intrabuilding power line communications

    Page(s): 321 - 326
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (392 KB)  

    A communication system for small-scale local area networks using the power transmission line is discussed. With this application in mind and noise power spectrum of a power line at 10 kHz-100 MHz and the impedance characteristics and transmission loss of a power line in the high frequency band (10 kHz-20 MHz) have been measured. Both narrowband and wideband data transmission are considered. The transmission loss of the power line increases with frequency, whereas the intensity of the noise power spectrum decreases rapidly. This means that power line communication by a single-sideband system is possible using a wide frequency band up to 100 MHz. However, the noise, impedance, and transmission characteristics vary greatly with frequency, so special considerations such as line impedance stabilization networks and other techniques are necessary View full abstract»

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  • Future trends in television

    Page(s): 279 - 284
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (484 KB)  

    The author examines technology trends and ideas that are considered likely to influence the future of television and related products and services. He discusses extended-definition and high-definition television services, and television signal transmission via satellite. He describes advanced television products, namely, large TV displays, small TV displays, VCR and video disk systems, education/games, and 3-D television View full abstract»

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  • Effective time-domain method for speech rate-change

    Page(s): 339 - 346
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (532 KB)  

    A speech-rate-change method is proposed that is a refinement of the pitch-adaptive methods and cuts at the length of one (multi)-pitch-length the speech segment that has a smooth short-time energy waveform. The method avoids phoneme transitions being discarded or repeated and thus produces high-quality rate-changed speech View full abstract»

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  • Switch mode vertical deflection circuits for TV sets

    Page(s): 347 - 351
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (204 KB)  

    It is shown, using a line power circuit, that the simplest possible cycloconverter, with only one thyristor, fills the deflection requirements during the vertical trace time and allows a short resonant flyback. Because the active components work in switched mode, they do not need any heat sink. The high efficiency provides an 8-W reduction in consumption at the mains. The short flyback time makes the converter especially attractive for future 32-kHz flicker-free TV sets View full abstract»

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  • System design of Super Home Bus System (S-HBS) for apartment building

    Page(s): 327 - 333
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (384 KB)  

    A home bus system for an apartment building, the Super Home Bus System (S-HBS), has been proposed and its effectiveness has been verified by system experiments. S-HBS is based on the KEC HBS for a single-family, detached dwelling. The concept, specifications, and experiments for S-HBS are described View full abstract»

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  • Is it possible to envisage a sound and image recording system free of electromechanical elements?

    Page(s): 298 - 301
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (264 KB)  

    The author describes the principles of an approach to video recording that does not use electromechanical components. The basis of the method is that analog modulation, after being converted to digital modulation, is photographically recorded on a film or transparency (square or rectangular), using the principle of matrix scanning. The speed of the scanning is determined by the characteristics of the matrix, type of digital coding, and the length of the recording and is controlled by an electronic clock, such as a quartz clock. The problems raised by this approach are discussed View full abstract»

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  • The Princeton Engine: a real-time video system simulator

    Page(s): 285 - 297
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (1032 KB)  

    The authors describe the Princeton Engine, a 29.3-GIPS image processing system capable of simulating video rate signals, including NTSC and HDTV video, in real time. It consists of a massively parallel arrangement of up to 2048 processing elements, each containing a 16-bit arithmetic unit, a multiplier, a 64-word triple-port register stack (one write, two read), and 16000 words of local processor memory. In addition, an interprocessor communication bus (IPC) permits exchanges of data between neighboring processors during one instruction cycle. The authors present a novel method of parallel programming for digital signal processing applications and provide several examples View full abstract»

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  • Problems set by stereotelevision

    Page(s): 361 - 365
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (320 KB)  

    The author described (1978) a process for obtaining three-dimensional TV pictures that could be watched directly without glasses. The system was based on the use of matricial emission and reception scanning with vision through a lenticular network. A color version of this stereotelevision system developed by Matsushita is very complicated and expensive, requiring five synchronized video tape recorders. The author proposes two possible solutions for a color scheme, one using a flat screen and the other using projection. He examines the effect of position of the viewer in relation to the lenticular network. He discusses the problem raised by the unavoidable increase of the passing band View full abstract»

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  • Two simple bar matrix display formats for alphanumeric English characters

    Page(s): 357 - 360
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (224 KB)  

    Two novel and very-simple bar matrix layouts having nine segments (plus a dot) and ten segments (plus two dots), respectively, for displaying English alphanumeric characters are proposed. The displays involve simpler interfacing circuits and consume less power than the 14-segment and 16-segment displays being presently used. The proposed layouts can be implemented in the form of display modules using easily manufactured LEDs (light emitting diodes) or LCDs (liquid crystal displays). The layouts are also suitable for CRT (cathode-ray tube) displays because they require very simple X- and Y-deflection waveforms View full abstract»

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  • A display system for Hindi numerics

    Page(s): 352 - 356
    Save to Project icon | Request Permissions | Click to expandQuick Abstract | PDF file iconPDF (180 KB)  

    The layout for a thirteen-segment Hindi numeric display is proposed. A BCD-to-thirteen segment decoder designed to be used with this numeric display is discussed. A preliminary verification of the functionality of the decoder was performed using a logic simulator. The output waveforms to verify the functional correctness of the decoder circuit are presented View full abstract»

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Aims & Scope

The main focus for the IEEE Transactions on Consumer Electronics is the engineering and research aspects of the theory, design, construction, manufacture or end use of mass market electronics, systems, software and services for consumers.

 

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
R. Simon Sherratt, IEEE Fellow
Professor of Consumer Electronics
School of Systems Engineering
The University of Reading
Reading, Berkshire RG6 6AY  U.K.
r.s.sherratt@reading.ac.uk; sherratt@ieee.org
Phone:+44 (0) 118 3788588