,
, EEE 334 Circuits II – Quiz 7: Digital CMOS |
CMOS Logic Gates, Inverters, Switching
Characteristics & Digital Circuit Analysis |
Questions & Answers | rated 100% correct.
SECTION 1: CMOS INVERTER FUNDAMENTALS &
OPERATING REGIONS (Questions 1–10)
1. In a CMOS inverter, when the input voltage is 0 V, which
transistor is ON and what is the output?
A) NMOS ON, output = 0 V
B) PMOS ON, output = VDD
C) Both transistors ON, output = VDD/2
D) Both transistors OFF, output = floating
Correct Answer: B
Rationale: When V_IN = 0 V, the NMOS gate-source voltage is 0 V (below
V_TN), so the NMOS is OFF. The PMOS source-gate voltage is VDD (above |
V_TP|), so the PMOS is ON. This pulls the output up to VDD .
Source: MIT Lecture 13 – CMOS Circuits
2. In a CMOS inverter, when the input voltage is VDD, which
transistor is ON and what is the output?
, EEE 334 Circuits II – Quiz 7: Digital CMOS |
CMOS Logic Gates, Inverters, Switching
Characteristics & Digital Circuit Analysis |
Questions & Answers | rated 100% correct.
SECTION 1: CMOS INVERTER FUNDAMENTALS &
OPERATING REGIONS (Questions 1–10)
1. In a CMOS inverter, when the input voltage is 0 V, which
transistor is ON and what is the output?
A) NMOS ON, output = 0 V
B) PMOS ON, output = VDD
C) Both transistors ON, output = VDD/2
D) Both transistors OFF, output = floating
Correct Answer: B
Rationale: When V_IN = 0 V, the NMOS gate-source voltage is 0 V (below
V_TN), so the NMOS is OFF. The PMOS source-gate voltage is VDD (above |
V_TP|), so the PMOS is ON. This pulls the output up to VDD .
Source: MIT Lecture 13 – CMOS Circuits
2. In a CMOS inverter, when the input voltage is VDD, which
transistor is ON and what is the output?
