An electronic hearing aid is a small device which is located in and around the human ear to enhance the hearing ability. It is used to compensate the hearing loss and enhance the quality of sound for hearing impaired people. Hearing aid device in signal processing is an important field of research for the last three decades. Recently, power aware hearing aid device designs with smaller footprint, gain considerable importance. The hearing aid device has been designed for portable communication equipment with digital filtering, speech processing, sub-band coding and speech enhancement. With the technological advancements in the Digital Signal Processing (DSP) algorithms, design of hearing aid devices has been improved continuously. It is expected that more innovations in hearing aid device technology will be released in future, with new developments in signal processing algorithms and filter bank designs. Finite Impulse Response (FIR) filter design is very important and crucial for signal processing algorithms. The focus of the designer is on minimization of power on the domain of digital circuit for battery operated devices. In this paper, Gated Diffusion Input (GDI) logic is used in the proposed Filter Bank design in order to minimize power. The Multiply-Accumulate (MAC) unit of the proposed filter bank is designed by GDI logic and modified GDI logic. GDI logic has three terminals which are Common Gate (G), PMOS (P), NMOS (N) and output terminal. The number of transistors is reduced in GDI when compared to Complementary Metal Oxide Semiconductor (CMOS) logic due to reduced switching activity. This paper briefly describes the basic functions of power and delay of GDI logic and modified GDI logic. The proposed modified GDI logic provides better results in area and power when compared to CMOS logic.
The Arduino UNO microcontroller based smart portable soil testing system is developed to determine the values like pH content and moisture level. This can be done using the sensor respectively to check the values. The GSM Module which uses the mobile communication to communicate the value to the given mobile. The communication method used here to retrieve the values whenever it is necessary and after getting the values it would be displayed in LCD. Then when the button is pressed, the GSM starts to work, search for the signal and after responding to the signal the values are sent to the registered mobile. This method would be easier to check the value of soil so that it will be viewed whenever the values are needed. It describes that the values are available at our doorstep because it is smart portable monitoring system. This project helps us to create a new idea to do further additional functions that can be done.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.