Draw a logic circuit diagram showing how a NAND gate can be converted to NOT gate?
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NAND and NOR Gate Equivalents
An Inverter or logic NOT gate can also be made using standard NAND and NOR gates by connecting together ALL their inputs to a common input signal for example.
A very simple inverter can also be made using just a single stage transistor switching circuit as shown.
When the transistors base input at “A” is high, the transistor conducts and collector current flows producing a voltage drop across the resistor R thereby connecting the output point at “Q” to ground thus resulting in a zero voltage output at “Q“.
Likewise, when the transistors base input at “A” is low (0v), the transistor now switches “OFF” and no collector current flows through the resistor resulting in an output voltage at “Q” high at a value near to +Vcc.
Then, with an input voltage at “A” HIGH, the output at “Q” will be LOW and an input voltage at “A” LOW the resulting output voltage at “Q” is HIGH producing the complement or inversion of the input signal.
An Inverter or logic NOT gate can also be made using standard NAND and NOR gates by connecting together ALL their inputs to a common input signal for example.
A very simple inverter can also be made using just a single stage transistor switching circuit as shown.
When the transistors base input at “A” is high, the transistor conducts and collector current flows producing a voltage drop across the resistor R thereby connecting the output point at “Q” to ground thus resulting in a zero voltage output at “Q“.
Likewise, when the transistors base input at “A” is low (0v), the transistor now switches “OFF” and no collector current flows through the resistor resulting in an output voltage at “Q” high at a value near to +Vcc.
Then, with an input voltage at “A” HIGH, the output at “Q” will be LOW and an input voltage at “A” LOW the resulting output voltage at “Q” is HIGH producing the complement or inversion of the input signal.
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