An XOR gate, voltage-controlled oscillator, and a few passive components make a frequency doubler

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Other Materials from the Main Document

• Article «Connect passive components to logic gates»
• Figure 1. Adding an RC filter to a logic gate produces a level voltage output with ripple
• Figure 2. An XOR gate, voltage-controlled oscillator, and a few passive components make a frequency doubler
• Figure 3. Make a frequency multiplier with a XOR gate, an op amp, two capacitors, an inductor, and a delay
• Figure 4. A D-type flip-flop and a VCO lets you set a sampling point in the center of a signal eye diagram
• Figure 5. Transformers turn logic gates into live drivers
• Figure 6. Use Schmitt-trigger XOR, OR, or AND gates to make pulse shapers
• Figure 7. A series of logic edges at a sub-harmonic of the tank resonant frequency will cause it to ring
• Figure 15. An XOR Schmitt trigger easily creates the sloppy pulses of Figure 3 with a simple RC network