By Topic

# Electronics Letters

## Filter Results

Displaying Results 1 - 25 of 53
• ### He plus remote plasma nitridation of ultra-thin gate oxide for deep submicron CMOS technology applications

Publication Year: 2001, Page(s):788 - 790
Cited by:  Papers (1)
| | PDF (448 KB)

The study of He plus remote plasma nitridation (RPN) technology for an ultra-thin gate dielectric in the 18-22 Å range is reported. Experimental results show that He can enhance the RPN process to reduce the gate current and effective thickness of gate dielectric films, especially for thinner gate dielectric films. In addition, the He plus RPN process allows the integrity of the ultra-thin g... View full abstract»

• ### Comparison of Si and SiC diodes during operation in three-phase inverter driving ac induction motor

Publication Year: 2001, Page(s):787 - 788
Cited by:  Papers (11)
| | PDF (312 KB)

4H-SiC JBS diodes have been used in an inverter circuit, driving an actual three-phase ac induction motor at power levels up to 2.2 HP. Switching waveforms were measured and compared between inverters based on Si PiN diodes and 4H-SiC MPS diodes. The results clearly show a significant reduction in power dissipation, in both the diode and the IGBT switch, when SiC diodes replace the Si diodes. The ... View full abstract»

• ### Maximum likelihood decoding bounds for high rate turbo codes over Lorentzian channels

Publication Year: 2001, Page(s):771 - 773
Cited by:  Papers (3)
| | PDF (412 KB)

Performance bounds are developed on the bit error probability of turbo codes over a Lorentzian channel, which is a realistic magnetic recording channel model. It is assumed that maximum likelihood decoding and uniform interleaving are employed. The results are applicable to linear codes over ISI channels View full abstract»

• ### Vertex adjustment method using geometric constraint for polygon-based shape coding

Publication Year: 2001, Page(s):754 - 755
Cited by:  Papers (1)
| | PDF (296 KB)

A new vertex selection scheme for polygon-based contour coding is proposed. The proposed method consists of two-step procedure'. Initial vertices are selected by using the conventional iterated refinement method (IRM) or progressive vertex selection (PVS) method. A vertex adjustment process then follows where the initial vertices are updated to produce an optimal polygon in the sense of error ar... View full abstract»

• ### Errata

Publication Year: 2001, Page(s): 803
| | PDF (92 KB)

First Page of the Article
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• ### Simulation model for performance evaluation of Internet applications using GPRS radio interface

Publication Year: 2001, Page(s):786 - 787
Cited by:  Papers (1)
| | PDF (292 KB)

Since Internet applications such as WWW, FTP and e-mail will work over the GPRS mobile system, it is important to establish how they perform using the GPRS radio interface. Results are presented that show the usefulness of the GPRS radio interface for Internet applications View full abstract»

• ### Increasing throughput of iterative decoders

Publication Year: 2001, Page(s):770 - 771
Cited by:  Papers (6)  |  Patents (8)
| | PDF (296 KB)

Decoding concatenated codes with an iterative decoder including a stopping criterion saves power compared to decoding with a fixed number of iterations. In this work the throughput of the decoder is also increased. This is achieved by using additional buffers at the decoder input and a modified stopping criterion. Simulations demonstrate that this method can double the throughput compared to the c... View full abstract»

• ### Temporal characterisation of forgiveness effect

Publication Year: 2001, Page(s):752 - 754
Cited by:  Papers (4)
| | PDF (484 KB)

A subjective quality test was performed to determine the extent to which low level and high level audio-video degradations are forgiven over time. The results show that the forgiveness effect initially greater for high level degradations. However, the forgiveness effect is more prolonged for low level degradations. A new method for calculating the forgiveness effect, based on rate of change in qua... View full abstract»

• ### Symmetric bulk charge linearisation in charge-sheet MOSFET model

Publication Year: 2001, Page(s):791 - 793
Cited by:  Papers (27)
| | PDF (396 KB)

An accurate, simplified version of the charge-sheet MOSFFT model is developed using symmetric linearisation of the bulk charge as a function of surface potential. The resulting MOSFET model satisfies the Gummel symmetry condition and is verified by comparison with the exact results View full abstract»

• ### 1×2 optical packet switch using all-optical header processing

Publication Year: 2001, Page(s):774 - 775
Cited by:  Papers (49)  |  Patents (1)
| | PDF (336 KB)

A 1×2 all-optical packet switch is presented. The header processing is implemented by using a SLALOM structure and an optical flip-flop memory is used to store the processed header bits. The packets are switched in wavelength by using cross-gain modulation. Experimental results are presented View full abstract»

• ### Hybrid opto-mechanical gyroscope with injection-interferometer readout

Publication Year: 2001, Page(s):756 - 758
Cited by:  Papers (4)
| | PDF (540 KB)

A hybrid micromachined-optoelectronic mechanical system (MOEMS) gyroscope is proposed. It consists of an electrically excited micro-mechanical resonator and an optical readout performed by a laser diode operating as an injection interferometer. An analysis of the system, validated by preliminary experimental results, indicates an attainable performance of 1 deg/h√Hz View full abstract»

• ### Computationally efficient high resolution DOA estimation algorithm

Publication Year: 2001, Page(s):795 - 796
| | PDF (268 KB)

A computationally efficient direction of arrival (DOA) estimation algorithm for closely spaced targets is proposed. The algorithm comprises two parts: an algorithm for discriminating closely spaced targets from a single target, and an algorithm for resolving the directions of arrival of the closely spaced targets. Simulations show that the proposed algorithm performs well with a low computational ... View full abstract»

• ### 8 THz bandwidth dispersion-slope compensator module for multiband 40 Gbit/s WDM transmission systems using an AWG and spatial phase filter

Publication Year: 2001, Page(s):777 - 778
Cited by:  Papers (5)  |  Patents (2)
| | PDF (336 KB)

The authors demonstrate a 2×40-channel dispersion-slope compensator for 40 Gbit/s wavelength-division multiplexing (WDM) transmission systems that employs an arrayed-waveguide grating (AWG) with a 4.0 THz bandwidth and a spatial phase filter. It can compensate for the dispersion slope of the entire bandwidth of C- and L-bands simultaneously View full abstract»

• ### Scalable RF MIS varactor model

Publication Year: 2001, Page(s):760 - 761
Cited by:  Papers (1)  |  Patents (1)
| | PDF (308 KB)

A scalable varactor model based on the equations in the BSIM3v3 model (Berkeley short-channel IGFET model) is presented to model the behaviour of a silicon,based metal-insulator-semiconductor (MIS) varactor with different device geometries and bias conditions at different operation frequencies. The root mean square (RMS) errors of the S-parameters between the measured and simulated data are less t... View full abstract»

• ### 100 GHz optical pulse generation using Fabry-Perot laser under continuous wave operation

Publication Year: 2001, Page(s):763 - 764
Cited by:  Papers (21)
| | PDF (304 KB)

Optical pulse generation at 100 GHz using a 1.5 μm Fabry-Perot laser is experimentally demonstrated under continuous wave operation. Although the output from the laser is almost constant, sub-picosecond short pulses at 100 GHz are obtained after propagation through a singlemode fibre. The measured radiofrequency spectrum confirms that the Fabry-Perot laser is passively modelocked View full abstract»

• ### Love mode layered surface acoustic wave filters

Publication Year: 2001, Page(s):802 - 803
Cited by:  Papers (4)
| | PDF (252 KB)

Novel surface acoustic wave filters have been developed by depositing SiO2 and ZnO thin films onto 90° rotated ST-cut quartz crystal substrates. Up to 19 dB insertion loss improvement was obtained for the filter with a ZnO film. The filters have no coupling with other wave propagating modes, exhibiting only one passband View full abstract»

• ### Technique for target detection and ranging based on broadband LPI radars

Publication Year: 2001, Page(s):784 - 786
Cited by:  Papers (3)
| | PDF (508 KB)

A processing technique for improving the ranging and detection capabilities of LPI radars and the measured performance of an experimental system are presented. The precision of the measured distance is very high even under low SNR conditions. The associated detection algorithm also exhibits good performance in noisy environments View full abstract»

• ### Robust automatic speech recognition in the presence of impulsive noise

Publication Year: 2001, Page(s):799 - 800
Cited by:  Papers (2)
| | PDF (372 KB)

A technique for suppressing the effect of any type of impulsive noise in the context of automatic speech recognition (ASR) is presented. The authors suggest the interposition in the mel frequency cepstral coefficients (MFCC) feature extraction front-end of (i) an identification stage responsible for the detection of corrupted cepstral vectors and (ii) a restoration stage that acts locally on the d... View full abstract»

• ### High-sensitivity 1 Gbit/s CMOS receiver integrated with GaAs- or InGaAs-photodiode by wafer-bonding

Publication Year: 2001, Page(s):781 - 783
Cited by:  Papers (2)  |  Patents (3)
| | PDF (504 KB)

1 Gbit/s III-V/CMOS hybrid receivers consisting of a GaAs- or InGaAs-photodiode and a 0.5 μm CMOS receiver circuit have been realised by wafer-bonding. The circuit is simple and compact with high sensitivity and broad bandwidth due to the direct attachment of III-V PDs and the absence of any parasitic capacitance. Sensitivities of -27.4 and -28.0 dBm at 1 Gbit/s are demonstrated for 0.85 and 1.... View full abstract»

• ### Efficiency improvement of broadband microwave amplifiers using current sharing concept

Publication Year: 2001, Page(s):769 - 770
Cited by:  Papers (1)
| | PDF (288 KB)

The authors present experimental results of a 2 to 18 GHz high-gain dual-stage feedback amplifier employing a novel concept of current sharing that drastically reduces the current consumption by 50% without compromising the amplifier performance and hence produces a more than two-fold improvement in the power-added efficiency View full abstract»

• ### Multiscale contrast enhancement

Publication Year: 2001, Page(s):751 - 752
Cited by:  Papers (4)  |  Patents (2)
| | PDF (356 KB)

A novel approach for image contrast enhancement is presented. A contrast measure which accounts for spatial structure information as derived within the context of a nonlinear multiscale representation generated by anisotropic diffusion is introduced. A local contrast map is computed, which is then used to enhance the original image View full abstract»

• ### Retrodirective array tracking prediction using active element characterisation

Publication Year: 2001, Page(s):727 - 728
Cited by:  Papers (9)
| | PDF (284 KB)

The authors report on the comparison between the measured and predicted monostatic radiation pattern of a four-element retrodirective array (RDA) operating at 1 GHz. Predictions of array performance were carried our using an isolated element approach then an active element approach. Classical modelling of the RDA performance yielded a worst-case amplitude error with respect to measurement of 3.7 d... View full abstract»

• ### Programmable multiplierless digital filter array for embedded SoC applications

Publication Year: 2001, Page(s):735 - 737
Cited by:  Papers (5)
| | PDF (460 KB)

The authors present a novel, programmable logic array for implementing high performance filter functions within embedded system-on-chip platforms. The novelty of the architecture is demonstrated through its specially tailored configurable logic units, and hierarchical routing scheme. The architecture and routing hierarchy are described using a filter example and results are provided demonstrating ... View full abstract»

• ### Stabilisation of modelocking in fibre ring laser through pulse bunching

Publication Year: 2001, Page(s):745 - 746
Cited by:  Papers (4)
| | PDF (472 KB)

Bunching of equally spaced pulses is reported to be the most stable mode of operation in a passively modelocked fibre ring laser. The ring includes dispersion management, which results in the absence of strict pulse energy quantisation, giving pulse bunching a better immunity to environmental perturbation View full abstract»

• ### High power X-band (8.4 GHz) SiGe/Si heterojunction bipolar transistor

Publication Year: 2001, Page(s):790 - 791
Cited by:  Papers (6)  |  Patents (2)
| | PDF (308 KB)

A high-performance double-mesa type Si/SiGe/Si power HBT at X-band (8.4 GHz) frequency is demonstrated. Under continuous wave operation, a single 20-finger common-base Si/Si0.75Ge0.25/Si (2×10 μm2 of each emitter finger) HBT has an output power of 27.4 dBm and an associated power gain of 7 dB at peak PAE of 32.3%. These parametric values represent the stat... View full abstract»

## Aims & Scope

Electronics Letters is internationally renowned for its rapid communication of new developments and emerging topics across the broad and interdisciplinary field of modern electronics and electrical engineering.

Full Aims & Scope

## Meet Our Editors

Editors-in-Chief

Professor Chris Toumazou
Director of the Biomedical Institute
Imperial College, London, UK

Professor Ian White