M5/B2 LOGIC CIRCUITS

How is a TTL output best described? High fan-out Bi-directional Low power. High fan-out. Bi-directional. Low power.

Which logic gate is used to invert input logic?. NOT gate. OR gate. AND gate.

If the output of an OR gate is logic 0, what are the input states?. A=0, B=1. A=1, B=1. A=0, B=0.

What logic gate outputs low when both inputs are low?. NOT gate. AND gate. NOR gate.

Which logic gate gives a high output when either input is high?. NOT gate. AND gate. OR gate.

A photodiode reacts to: Light. Current. Voltage.

What does an IRS (Inertial Reference System) battery supply provide?. Standby power when airborne and on the ground. Standby power only on the ground. Standby power only whilst in flight.

Which gate requires both inputs to be high for a high output?. NOT gate. OR gate. AND gate.

Which gate gives output 1 only when both inputs are 0?. OR gate. NOR gate. AND gate.

Which logic family uses the least power?. Low-power Schottky TTL. CMOS. TTL.

What is the correct fan-out of a typical TTL gate?. 2. 10. 50.

Which logic gate outputs a 1 only when both inputs differ?. OR gate. AND gate. Exclusive OR gate.

What is the output of an AND gate when A=1 and B=0?. 1. Undefined. 0.

What component emits electrons when hit by photons?. Zener diode. Laser diode. Photodiode.

What gate outputs a 1 when either or both inputs are 1?. NAND gate. NOT gate. OR gate.

What must be the logic states of an AND gate to output 1?. A=1, B=1. A=1, B=0. A=0, B=0.

How does data travel in the ARINC 429 digital information transfer system?. Both direction on the same bus sequentially by time multiplexing. Both directions on the same bus simultaneously. One direction.

What is the fan-out of a standard TTL logic gate?. 1. 5. 10.

What is a characteristic of ARINC 629?. All LRU’s can transmit at the same time. All LRU’s can transmit and receive at the same time. Data can transmit in both directions down the data bus.

Which of these is used in fiber optic receivers?. Zener diode. Laser diode. Photodiode.

What is the preferred logic family for portable test equipment?. Low-power Schottky TTL. TTL. CMOS.

What does CMOS stand for in logic circuits?. Current Mode Operating System. Critical Metal Output Sensor. Complementary Metal-Oxide Semiconductor.

Which gate inverts the output of an AND gate?. NOR gate. OR gate. NAND gate.

What is the typical maximum forward current for an LED?. 0.03 A. 0.3 A. 3.

A diode that emits coherent light is called: Photodiode. LED. Laser diode.

Which of the following has unidirectional data transmission?. ARINC 629. RS-485. ARINC 429.

Which logic gate only outputs high when both inputs are high?. NOR gate. NAND gate. AND gate.

How does data flow in ARINC 429?. Simultaneous bi-direction. One direction. Bi-directionally over time multiplex.

What component emits photons when current flows through it?. LED. Laser diode. Photodiode.

Which logic gate is typically represented as a parallel circuit?. OR gate. Exclusive OR gate. NAND gate.