MOS-only design automation and a simple agile MOS-only BP/LP filter design
In this work, a systematic of the automation in the result of the re-obtained small signal parameters based on SPICE is presented for MOS-Only circuits. Accuracy of the re-obtained parameters was improved by re-formulating in the basis of SPICE and CADENCE-SPECTRE. Moreover, piece-wise polynomial regressive models are presented for gds, gm and Ids-Also, performance of the models are compared with conventional expressions. Success of the given MOS-Only design automation based on re-obtained small signal parameters is verified with an examplary new agile filter.
A low power MOSFET-C filter for low frequency applications with polynomial regressive design
In this work, a novel current mode MOSFET-C filter is proposed for a wide range of low frequency applications from biomedical signal sensing up to speech processing region. Presented filter consumes only 2μW under 1V supply voltage. Besides, proposed filter is given with novel design methodology based on polynomial regressive small signal models. In this way, promising interaction between design parameters such as VGS, VDS, channel width (W) and channel length (L) and filter specs such as f0, Q and power is provided. Simulation results in 0.18μm CMOS technology are given and proposed filter is tested to process a real fetal PCG signal. It is shown that proposed filter attains a promising performance in comparison with the previously presented counterparts for low frequency applications.
Suitability and water quality criteria of an open drainage municipal sewage water at Coimbatore, used for irrigation.
Sanganur canal is the major open drainage system which has intricate linkage with storm water supply, domestic sewage and industrial effluent disposal. Water samples from various stations were collected and analysed for physicochemical parameters to assess the water quality of the Sanganur canal system. The study revealed that physicochemical parameters like pH, EC, TDS, DO, BOD, COD exceeded the permissible limit, clearly indicating the need of proper treatment of waste water before discharge into the Noyyal river.