Add a resistor and capacitor to a basic Schmitt-trigger buffer to form a low-cost oscillator

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Other Materials from the Main Document

• Article «Add a Schmitt-trigger function to CPLDs, FPGAs, and applications»
• Figure 1. Use a portion of a programmable-logic device or gate array to implement a Schmitt-trigger buffer (a) by adding either two (b) or four external resistors (c)
• Figure 2. Add a resistor and capacitor to a basic Schmitt-trigger buffer to form a low-cost oscillator
• Figure 3. An active-low buffer holds timing capacitor C discharged in this version of a retriggerable monostable multivibrator based on the Schmitt-trigger buffer
• Figure 4. A NAND gate locks out trigger pulses, forming a nonretriggerable, monostable circuit
• Figure 5. Use a Schmitt trigger to debounce switch contacts