CA3080 Amplitude Modulator (CB25134E)

This 2-quadrant modulator circuit was found in the May 1988 issue of Radio Electronics magazine. The CA3080 is an OTA operational amplifier.

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Guitar preamp (CB22146E) Found in an English publication from 1989, this circuit uses a still common operational amplifier. The power supply does not have to be symmetrical. a href="images/stories/bc/04291029"
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