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Electronics/Digital_Circuits/Four_bit_adder.md
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Electronics/Digital_Circuits/Four_bit_adder.md
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---
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---
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categories:
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categories:
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- Hardware
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- Electronics
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- Electronics
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tags: [logic-gates, binary]
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tags: [logic-gates, binary]
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---
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@ -47,7 +47,9 @@ The diagrams below show a transistor being used in a circuit to create 'on' and
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- $V^{in}$ is the voltage that electrically controls the switch-as-transistor
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- $V^{in}$ is the voltage that electrically controls the switch-as-transistor
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- $V^{out}$ is the voltage we want to control: it will be high when the transistor is in the 'on' state and low otherwise
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- $V^{out}$ is the voltage we want to control: it will be high when the transistor is in the 'on' state and low otherwise
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- $V^{cc}$ stands for "common collector" and is the positive supply voltage appliced to the collector terminal
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- $V^{cc}$ stands for "common collector" and is the positive supply voltage appliced to the collector terminal
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is "on".
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When the voltate at the base is low (in the diagram it is grounded to ensure this) no current flows from the c
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We recall that voltage is the potential difference between two points or terminals in a circuit. High voltage increases the flow of current, low voltage restricts or reduces it.
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We recall that voltage is the potential difference between two points or terminals in a circuit. High voltage increases the flow of current, low voltage restricts or reduces it.
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When the voltage at the base is high a current flows from the collector to the emitter and the transistor is "on".
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When the voltage at the base is high a current flows from the collector to the emitter and the transistor is "on".
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