本文作者被赋予做一台真正低成本的扫频音调产生器(swept frequency tone generator)，只使用一些简单的运算放大器，且没有一个零件是单一来源…他成功了，且这台扫频音调产生器在产线被生产了500台。 我需要做一台真正低成本的扫频音调产生器(swept frequency tone ...

An essential tool for all mobile musicians, Pulse Tone Generator enables users to easily set a frequency and choose between four possible wave forms. Users can also select from two types of standard ...