Low Complexity All-Pass Based Polyphase Decimation Filters for ECG Monitoring

This paper presents a low complexity high efficiency decimation filter which can be employed in EletroCardioGram (ECG) acquisition systems. The decimation filter with a decimation ratio of 128 works along with a third order sigma delta modulator. It is designed in four stages to reduce cost and power consumption. The work reported here provides an efficient approach for the decimation process for high resolution biomedical data conversion applications by employing low complexity two-path all-pass based decimation filters. The performance of the proposed decimation chain was validated by using the MIT-BIH arrhythmia database and comparative simulations were conducted with the state of the art.

Highly linear reconfigurable UWB filters with independently controlled dual bandnotch

This letter proposes a high-linearity reconfigurable lower ultra-wideband (3.1–5.25 GHz) filter with independently controlled dual bandnotch at WiMAX 3.5 GHz band and satellite communication systems 4.2 GHz band. Reconfigurability has been achieved by the implementation of Graphene based switches (simulation only) and PIN diodes (measurements). The simulation and measurement results in OFF state show an entire bandpass response from 3.1 GHz to 5.25 GHz and with a very low insertion loss. In ON state, the results show that sharp rejections at 3.5 GHz and 4.2 GHz are achieved, with a low passband insertion loss. The two bandnotch operate independently of each other; thus allowing to control the behaviour of the required bandnotch. The third order intermodulation products were also measured in OFF and ON states and the linearity results have been presented. The filter is able to achieve a high performance with good linearity and no significant loss.

Be careful what you wish for: the legal parameters of EU withdrawal

Easiness with which the political circles talk about withdrawal from the European Union is rather surprising and proves that the legal parameters of an EU exit are not treated seriously enough. In theoretical terms Article 50 TEU allows for a unilateral exit as well as for a consensual divorce. Arguably, the first is an interesting abstract proposition, which, however, in practical terms seems to be an unworkable solution. Hence, the only realistic option is a proper divorce based on a withdrawal agreement. As per Article 50 TEU, it would be negotiated by the European Union with a departing country and should cover the terms of withdrawal and “take account of future relations” between the EU and the divorcee. It is submitted that in order to avoid a legal vacuum, this agreement should not only “take account of future relations” but actually deal with them thoroughly. This will make the negotiations difficult and, most likely, time consuming. One also has to envisage a scenario whereby a country leaving the European Union would join EFTA and become a EFTA-EU Member State of the European Economic Area. Should that happen the scope of a EU withdrawal agreement would be limited to the terms of exit, while future relations between the divorcee and the European Union would be mainly covered by the EEA Agreement. This chapter unlocks the mechanics of Article 50 TEU and the withdrawal procedure it provides for. It covers the issues that should be attended to by the negotiators and provides an overview of dossiers that are likely be covered in a withdrawal agreement.