Diode Modulators April 1953 QST
Byron Goodman published a very thorough diode modulator article in a 1953 issue of the American Radio Relay League's QST magazine. It was one of the first of such articles that used the very recently available semiconductor diodes rather than the previously used vacuum tubes. Single-balanced bridge and ring modulator circuits are presented, along with the theory behind their operation. It would be a few years more before double balanced mixers with their abilities to reject even intermodulation products, and triple balanced mixers with very high overall spurious product rejection, would become commonplace.
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By Byron Goodman, W1DX.
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差動回路 アマチュア無線
1957年の回路、am変調。
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clock同期して同期検波。 同期レスならプロダクト検波。
diodeの向きは妖しいので注意
同期検波専用ic TDA4001やTA7641も、クエアドラチャコイルで少し工夫するとSSB復調できる。
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