著者

金本 良重

出版者

一般社団法人 品質工学会

雑誌

品質工学 (ISSN:2189633X)

巻号頁・発行日

vol.6, no.5, pp.33-37, 1998-10-01 (Released:2016-06-10)

参考文献数

1

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In the transmission of information, it is necessary to modulate the input signal. The frequencies of the signals for voice or music are generally low and the waves cannot be effectively transmitted remotely. For a good transmission, signals are modulated to high frequency waves. AM and FM are the modulation methods used for analog wave transmission. In the AM modulation, amplitude is changed whereas in the FM modulation,frequency is changed. Since the latter is more robust against noise, it is widely used for radios, TVs,transceivers or business radios. In the FM system modulation, voltage is used as the signal to change frequency. In this report, parameter design was conducted for the stabilization of an FM modulation circuit. In the traditional parameter design approach for electric circuits, power is used as the signal and is also measured as the output. However, it is inappropriate because the amplitude of both the input and the output are the same. In this report, a new generic function was proposed by considering frequency as the output frequency, and power was treated as noise.