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Circuit Bench

  • FM Signal Generator (CB16973E)

      This circuit generates a signal in the tone-modulated FM range for tuning receivers. The circuit is...

  • Polarity Indicator (CB16729E)

      This simple polarity indicator for continuous voltages can operate with voltages from 3 to 15 V...

  • Undervoltage indicator (CB9131E)

           Found in National Semiconductor documentation from the 1980s, this circuit uses an operational...

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