…The superheterodyne method links the input f 1 and the local oscillator f 2 to convert to a constant intermediate frequency f 1 - f 2 and amplify and detect it, so this method can obtain stable high gain and excellent selection characteristics. The upconverter excites the nonlinear capacitance with f 2 , adds the input signal f 1 through a tuning circuit, and extracts the output converted to high frequency through the tuning circuit of f 1 + f 2. At this time, the power of f 2 is converted, and a gain of ( f 1 + f 2 ) / f 1 is obtained. … *Some of the terminology that mentions "upconverter" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…スーパーヘテロダイン方式は入力f1と局部発振f2を連動させて一定の中間周波f1-f2に変換して増幅検波するので,この方式では安定な高利得と優れた選択特性が得られる。アップコンバーターは非線形容量をf2で励振しておき,同調回路を通してf1の入力信号を加え,f1+f2の同調回路を通して高周波に変換された出力を取り出す。このときf2の電力が変換されて,(f1+f2)/f1の利得が得られる。… ※「アップコンバーター」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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