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Q8. The points A, B and C in the circuit below can be individually switched to connect either to +V = 5V or to ground. With the switch in the open position (as is shown in the drawing) it is connected to GND through the pull-down resistor Rp (value 1 kQ) an we can consider this as a LO input. When the switch is closed, that point will be connected to the +5V line and can consider it a HI input. Diodes D1 - D3 are Si diodes with VT = 0.7 V, while the LED has VT = 2.0 V. Explain how the voltage (logic) level at each of A, B and C will determine the ON/OFF status of the LED on the output. What logic function has been implemented here ? Hint: The LED will switch on or not depending on the value of the voltage Vouin the circuit. +V= 5V RU IOK RD Ik RED RD 3302 Jk LED. RD sk Status of output Diode A В Output Diode Status GND GND GND GND GND +V GND +V GND GND +V +V +V GND GND +V GND +V +V +V GND +V +V +V w tw tw

Q8. The points A, B and C in the circuit below can be individually switched to connect either to +V = 5V or to ground. With the switch in the open position (as is shown in the drawing) it is connected to GND through the pull-down resistor Rp (value 1 kQ) an we can consider this as a LO input. When the switch is closed, that point will be connected to the +5V line and can consider it a HI input. Diodes D1 - D3 are Si diodes with VT = 0.7 V, while the LED has VT = 2.0 V. Explain how the voltage (logic) level at each of A, B and C will determine the ON/OFF status of the LED on the output. What logic function has been implemented here ? Hint: The LED will switch on or not depending on the value of the voltage Vouin the circuit. +V= 5V RU IOK RD Ik RED RD 3302 Jk LED. RD sk Status of output Diode A В Output Diode Status GND GND GND GND GND +V GND +V GND GND +V +V +V GND GND +V GND +V +V +V GND +V +V +V w tw tw

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Q8. The points A, B and C in the circuit below can be individually switched to connect either to +V = 5V or to ground. With the switch in the open position (as is shown in the drawing) it is connected to GND through the pull-down resistor Rp (value 1 k2) an we can consider this as a LO input. When the switch is closed, that point will be connected to the +5V line and can consider it a HI input. Diodes D1 - D3 are Si diodes with VT = 0.7 V, while the LED has Vr = 2.0 V. Explain how the voltage (logic) level at each of A, B and C will determine the ON/OFF status of the LED on the output. What logic function has been implemented here ? Hint: The LED will switch on or not depending on the value of the voltage Vout in the circuit. V= 5V RU IOK A RD RED 3302 RD LED D3 RD Status of output Diode A B Output Diode Status GND GND GND GND GND +V GND +V GND GND +V +V +V GND GND +V GND +V +V +V GND +V +V +V Logic Function AZ
Transcribed Image Text:Q8. The points A, B and C in the circuit below can be individually switched to connect either to +V = 5V or to ground. With the switch in the open position (as is shown in the drawing) it is connected to GND through the pull-down resistor Rp (value 1 k2) an we can consider this as a LO input. When the switch is closed, that point will be connected to the +5V line and can consider it a HI input. Diodes D1 - D3 are Si diodes with VT = 0.7 V, while the LED has Vr = 2.0 V. Explain how the voltage (logic) level at each of A, B and C will determine the ON/OFF status of the LED on the output. What logic function has been implemented here ? Hint: The LED will switch on or not depending on the value of the voltage Vout in the circuit. V= 5V RU IOK A RD RED 3302 RD LED D3 RD Status of output Diode A B Output Diode Status GND GND GND GND GND +V GND +V GND GND +V +V +V GND GND +V GND +V +V +V GND +V +V +V Logic Function AZ
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