BEC Annex 4 Review

Front

What is hysteresis in a voltage comparator?

Back

Hysteresis is a technique used in voltage comparators to reduce noise and prevent false triggering by creating a range of input voltages where the output remains stable.

Front

What happens when an upclock is sent to the clock input of a flip-flop with an activated CLR (R) pin?

Back

The output will be Logic 0 because the CLR (R) pin is activated, overriding the clock input.

Front

What is the output Q of a flip-flop when the inputs are set such that it is reset?

Back

The output Q will be 0 when the flip-flop is reset.

Front

What is the primary purpose of an operational amplifier?

Back

The primary purpose of an operational amplifier is to provide high amounts of gain for amplifying signals.

Front

What are logic gates used for in digital circuits?

Back

Logic gates are used to perform basic logical functions that are fundamental to digital circuits, such as AND, OR, NOT operations.

Front

What is a flip-flop in digital electronics?

Back

A flip-flop is a bistable device that can store one bit of data, having two stable states.

Front

What is the function of a clock signal in sequential circuits?

Back

A clock signal synchronizes the operation of sequential circuits, determining when data is read or written.

Front

What is the difference between synchronous and asynchronous flip-flops?

Back

Synchronous flip-flops change state in response to clock signals, while asynchronous flip-flops can change state immediately based on input changes.

Front

What is the role of a PRESET (S) pin in a flip-flop?

Back

The PRESET (S) pin is used to set the output Q to Logic 1 regardless of other inputs.

Front

What is the significance of input impedance in operational amplifiers?

Back

High input impedance in operational amplifiers prevents loading of the previous stage and allows for accurate signal amplification.