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# Electronics Letters

## Filter Results

Displaying Results 1 - 25 of 40
• ### In brief

Publication Year: 2010, Page(s): 1240
| | PDF (113 KB)

First Page of the Article
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• ### Interview

Publication Year: 2010, Page(s): 1240
| PDF (88 KB)
• ### Security breaks a sweat

Publication Year: 2010, Page(s):1241 - 1242
| | PDF (412 KB)

A robust image processing method that detects fingertip liveness through its active sweat pores has been developed by researchers at Brunel University in the UK. Their technique could greatly improve the security of fingerprint identification systems which are currently susceptible to forgery by artificial fingertips. View full abstract»

• ### Raising a barrier

Publication Year: 2010, Page(s): 1242
| | PDF (72 KB)

The range of mid-infrared barrier photodetectors has been extended to cover the whole 3-5 μm atmospheric transmission window by researchers at Jet Propulsion Laboratory (JPL) at California Institute of Technology in the US. By incorporating self-assembled quantum dots into the absorber of the photodetector, they increased the cutoff wavelength from 4.2 to 6 μm and demonstrated an inf... View full abstract»

• ### Beam steerable IR-UWB antenna array with FCC-compliant impulse generators

Publication Year: 2010, Page(s):1245 - 1246
| | PDF (197 KB)

A novel method for beam steering with an active ultra-wideband antenna array is presented for impulse-radio ultra-wideband. The antenna array consists of four planar Vivaldi antennas in a collinear arrangement with an impulse generator circuit mounted chip-on-board on each antenna element. The beam steering is done by shifting the phase of the control signals triggering the impulse generators. In ... View full abstract»

• ### CPW-fed ultra-wideband antenna with triple-band notch function

Publication Year: 2010, Page(s):1246 - 1248
Cited by:  Papers (5)
| | PDF (292 KB)

Proposed is the design strategy for the triple-band notched ultra-wideband (UWB) antenna emphasising the rejection characteristic at 3.5/5.5/8.2 GHz bands. The essence of the design strategy is embedding the three notching elements onto the primitive antenna to serve as respective stop band filters. On embedding, the hot issue is how to minimise the level of cross-coupling among the three elements... View full abstract»

• ### Electronically tunable phase response for phased array patches

Publication Year: 2010, Page(s):1248 - 1249
Cited by:  Papers (1)
| | PDF (207 KB)

The design and prototyping of radiating elements with tunable phase response, for reconfigurable patch array antennas, is presented. Different options are found in the technical literature to obtain feasible reconfigurable array antennas: placing the active circuitry in the transmission lines or directly over the radiating element, obtaining the desired phase shift for each radiating element of th... View full abstract»

• ### Ultra-wideband loop antenna

Publication Year: 2010, Page(s):1249 - 1251
Cited by:  Papers (3)
| | PDF (1275 KB)

An ultra-wideband loop antenna is proposed that is based on a wavelength loop antenna and a slot antenna. The self-complementary principle is applied to the designed ultra-wideband antenna. The antenna operates as a loop antenna in the low frequency band (0.3-1-GHz) and as a slot antenna in the high frequency band (1-14.2-GHz). The measured -10-dB bandwidth is 47.3:1 (0.3-14.2-GHz), and the size o... View full abstract»

• ### Improved nearest centroid classifier with shrunken distance measure for null LDA method on cancer classification problem

Publication Year: 2010, Page(s):1251 - 1252
| | PDF (120 KB)

Null linear discriminant analysis (LDA) is a well-known dimensionality reduction technique for the small sample size problem. When the null LDA technique projects the samples to a lower dimensional space, the covariance matrices of individual classes become zero, i.e. all the projected vectors of a given class merge into a single vector. In this case, only the nearest centroid classifier (NCC) can... View full abstract»

• ### Power-efficient injection-locked oscillator for biomedical telemetry applications

Publication Year: 2010, Page(s):1252 - 1254
Cited by:  Papers (2)
| | PDF (199 KB)

A low-voltage low-power injection-locked RF oscillator using a self-cascode structure and body terminal coupling is reported. A self-cascode structure facilitates higher resistance in each conducting path and helps achieve low-power operation without degrading the voltage headroom. Body terminal coupling provides injection-locking without appreciably increasing the power consumption. The proposed ... View full abstract»

• ### 12b 50 MS/s 0.18 μm CMOS ADC with highly linear input variable gain amplifier

Publication Year: 2010, Page(s):1254 - 1256
| | PDF (303 KB)

A 12b 50 MS/s 0.18 m CMOS ADC with a highly linear variable gain amplifier (VGA) for medical ultrasound and CCD image sensor applications is presented. The proposed four-step pipeline ADC optimises power and chip area at target specifications while the front-end VGA, based on a conventional approximated log function, employs a merged capacitor switching scheme to improve the VGA gain linearity. Th... View full abstract»

• ### SCTF loop for noise reduction in Autozero amplifiers

Publication Year: 2010, Page(s):1256 - 1257
Cited by:  Papers (1)
| | PDF (132 KB)

The use of a lowpass switched continuous time filter (SCTF) in the noise cancellation loop of an Autozero amplifier to reduce the white noise aliasing effect at low frequencies is presented. The SCTF limits only the bandwidth of the sampled noise, not the bandwidth of the amplifier. Time domain simulations showing the effect of the SCTF-Autozero on both flicker and white noise are presented, as we... View full abstract»

• ### CCO-based low-power analogue-to-digital converter

Publication Year: 2010, Page(s):1257 - 1258
| | PDF (209 KB)

A low-power analogue-to-digital converter (ADC) using a linear current-controlled oscillator (CCO) is presented. The circuit is fabricated in TSMC 0.18 m CMOS technology. The ADC has 10-bit resolution at maximum sampling rate of 1 MHz with 1.5 LSB integral nonlinearity and 0.25 LSB differential nonlinearity. The ADC consumes a maximum power of 3.5 mW from a 1.8 V supply at a frequency of 1.14 GHz ... View full abstract»

• ### Differential-read symmetrical 8T SRAM bit-cell with enhanced data stability

Publication Year: 2010, Page(s):1258 - 1260
Cited by:  Papers (1)
| | PDF (295 KB)

A simple but novel 8-transistor (8T) SRAM cell with enhanced data stability is presented. During a read operation, the proposed cell suppresses a noise-vulnerable 0 node rising, and hence exhibiting a near-ideal butterfly curve essential for robust bit-cell design. The cell itself bears improved variability tolerance which gives much tighter stability distribution across skewed process corners. ... View full abstract»

• ### Floating-gate CMOS ternary latch

Publication Year: 2010, Page(s):1260 - 1262
| | PDF (177 KB)

The design of a novel floating-gate CMOS ternary latch is presented. The design is based on a CMOS latch with level shifters that are realised using floating-gate techniques. The three stable operating points possessed by this circuit allow the cell to realise a ternary latch. The number of operating points possessed by the latch can be set using an external DC voltage. Measurement results from a ... View full abstract»

• ### Panning sorter: An approach to the design of minimal-hardware parallel-input data sorters

Publication Year: 2010, Page(s):1262 - 1263
Cited by:  Papers (1)
| | PDF (302 KB)

The panning sorter is introduced, offering a new approach to the design of highly compact digital parallel-input sorters for low power 2D applications, such as image processing and data switching, among others. The result is believed to be the smallest sorter circuit for this type of implementation, for the given time complexity. View full abstract»

• ### Simple architecture for subsampling LC-based ΣΔ modulators

Publication Year: 2010, Page(s):1263 - 1264
Cited by:  Papers (2)
| | PDF (236 KB)

A simple architecture for subsampling LC-based continuous-time ΣΔ modulators is introduced. The concept of utilising loop delay to simplify the modulator architecture is generalised to subsampling modulators. Moreover, it is shown that is possible to remove the delay-compensation branch usually used in traditional designs. Removing the delay-compensation branch results in significant... View full abstract»

• ### Multi-state dependent parameter model identification and estimation for nonlinear dynamic systems

Publication Year: 2010, Page(s):1265 - 1266
| | PDF (98 KB)

An important generalisation of the state dependent parameter approach to the modelling of nonlinear dynamic systems to include multi-state dependent parameter (MSDP) nonlinearities is described. The recursive estimation of the MSDP model parameters in a multivariable state space occurs along a multipath trajectory, employing the Kalman filter and fixed interval smoothing algorithms. The novelty of... View full abstract»

• ### Image fusion performance metric based on mutual information and entropy driven quadtree decomposition

Publication Year: 2010, Page(s):1266 - 1268
Cited by:  Papers (12)
| | PDF (211 KB)

The mutual information (MI) measure has become a popular metric to assess image fusion performance. However, despite its publicity, it provides a questionable result that consistently favours additive fusion (averaging) over multi-scale decomposition (MSD) fusion algorithms. Presented is a localised variation of MI to assess image fusion performance while preserving the importance of local structu... View full abstract»

• ### Automatic detection of active sweat pores of fingerprint using highpass and correlation filtering

Publication Year: 2010, Page(s):1268 - 1269
Cited by:  Papers (7)
| | PDF (383 KB)

A new technique is introduced for the automatic extraction and location of active sweat pores in a fingertip image. The combined technique includes highpass filtering followed by correlation. Results are presented for a fingertip image obtained using a high-resolution micro-capture camera. This automated method of detecting active sweat pores will help to implement liveness detection in existing f... View full abstract»

• ### Robust subpixel image registration of different-exposed images

Publication Year: 2010, Page(s):1270 - 1271
Cited by:  Papers (1)
| | PDF (156 KB)

Proposed is a new robust image registration method that can perform subpixel image registration for different-exposed images with highly photometric distortion. In this method, phase congruency is used to eliminate the effects of illumination change and photometric distortion for image registration using the phase correlation technique. Considering the presence of non-overlapped regions owing to p... View full abstract»

• ### Low-voltage, low-power, high linearity front-end thermal sensing element

Publication Year: 2010, Page(s):1271 - 1272
Cited by:  Papers (3)
| | PDF (230 KB)

A CMOS implementation of a low-voltage, low-power, high linearity front-end thermal sensing element is described. It is based on CMOS transistors operating in weak inversion. The power supply can be as low as 0.8 V and the power consumption is less than 100 nW. The inaccuracy (3 ) is about 0.24 C at room temperature and the linearity (fitting index R2) is greater than 0.99. These featur... View full abstract»

• ### Crosstalk reduction between metal-strips with subwavelength periodically corrugated structure

Publication Year: 2010, Page(s):1273 - 1274
Cited by:  Papers (1)
| | PDF (217 KB)

A new kind of microstrip line on which the spoof surface plasmon polaritons (SPPs) can propagate at low frequencies (such as microwave or terahertz regime) is developed. The upper metal-strip is designed by introducing subwavelength periodically inward openings on the edges. Numerical methods are used to analyse the dispersion relation and the asymptotic frequency. It is verified that such periodi... View full abstract»

• ### Highly miniaturised single metal layer CPW bandstop filters based on spiral resonators

Publication Year: 2010, Page(s):1274 - 1275
Cited by:  Papers (1)
| | PDF (184 KB)

Miniaturised CPW bandstop filters based on complementary spiral resonators etched into a single metal layer are demonstrated. The resulting electrical size is λg/44. Hence, a high degree of miniaturisation is achieved. These filters could hold high potential for applications where miniaturisation and compatibility with planar technology are key issues. View full abstract»

• ### Amplified spontaneous emission rejection with multi-functional MEMS tunable filter

Publication Year: 2010, Page(s):1275 - 1277
| | PDF (232 KB)

A multi-functional microelectromechanical system (MEMS) tunable optical filter as an amplified spontaneous emission (ASE) rejection filter in an optical communication system is presented. The MEMS tunable filter can tune both the centre wavelength and the passband independently and continuously in C-band. This filter was applied to a 10 Gbit/s system and system-performance improvement by adjusting... 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
Head of Photonics Research
University of Cambridge, UK