Waveform generator II

Posted on Sep 29, 2012

The circuit uses a CA3060 triple OTA (two units serve as switched current generators controlled by a third amplifier). A CA3160 BiMOS op amp serves as a voltage follower to buffer the 0.0022 µ¥ integrating capacitor. The circuit has an adjustment range of 1,000,000:1 and a timing range of 20 µ& to 20 sec. The `ON-OFF` switch actuates an LED that serves as both a pilot light and a low-battery indicator.

Waveform generator II
Click here to download the full size of the above Circuit.

The LED extends battery life, since it drops battery voltage to the circuit by approximately 1.2 volts, thus reducing supply current.

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