LMV331-N, LMV339-N, LMV393-N

SNOS018H – AUGUST 1999 – REVISED DECEMBER 2014

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Typical Applications (continued)

8.2.2 Crystal Controlled Oscillator

Figure 23. Crystal Controlled Oscillator

A simple yet very stable oscillator that generates a clock for slower digital systems can be obtained by using a

resonator as the feedback element. It is similar to the squarewave oscillator, except that the positive feedback is

obtained through a quartz crystal. The circuit oscillates when the transmission through the crystal is at a

maximum, so the crystal in its series-resonant mode.

50% duty cycle by maintaining a DC voltage at the inverting input equal to the absolute average of the output

waveform.

When specifying the crystal, be sure to order series resonant with the desired temperature coefficient.

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