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The phase-locked loop (PLL) is a feedback control system, used to lock the output frequency and phase according to the frequency and phase of input signal. It can also be used as a frequency synthesizer for modulation and demodulation circuits. In general, PLL is used in both transmitting and receiving terminals of wireless communication systems. A nearly description of PLL appeared in the paper by Appleton in 1923. It was conceived by H. De Bellecize in 1932. Since then, it is widely used in applications involving automatic control of phase or frequency, such as applications in...

The study entitled The Role and Status of the Women in the Laladighirpar Slum: A Study is basically a qualitative study substantiated by quantitative data. The major objectives of this study are to know about the socio-economic status of women in slums, investigate the role of women in family and outside family, identify the level of awareness about the role and status of women among the people living in slums, examine the present status of women in the slums areas with special reference to employment, education, skill and social status, And investigate the reasons as to why the slum women is...

The study explores multidimensional factors relating to the current status of primary education in a tea garden of Bangladesh. The data are collected from the tea workers through different techniques like Interview Schedule, Observation, FGD and Informal Discussions. The study is based on quantitative and qualitative analysis supported by both kinds of data. The data that are collected have been analyzed and explained from different theoretical points of view so that the situation of primary education in the tea garden could be better understood. The findings adequately explain...

The thesis entitled "Survival Pattern of Flood Affected People Living in Haser Kandy Village in Shariatpur District: A Study" is a combination of qualitative as well as quantitative analysis. The major objectives of the study is to know the Survival pattern of flood affected people without this there are some Specific objectives are to know about the socio-economic profile of the flood - affected people, To understand the strategies of ensuring food security and sources of drinking water during the period of flood, To investigate into the shelter related problems and the ways flood...