Linear Integrated Circuits: Voltage Regulators

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What is a characteristic of linear integrated circuits (ICs) that distinguishes them from other types of ICs?

Their output is directly proportional to the input (correct)
They operate in the saturation region
They produce a non-linear output
They can only be used in digital circuits

Which of the following applications is NOT typically associated with instrumentation amplifiers?

Data acquisition systems
Precision measurements
Sensor amplification
Power supplies (correct)

What is the primary function of the 78XX series of voltage regulators?

To regulate the output voltage in power supply circuits (correct)
To amplify weak input signals in analog circuits
To filter out noise in instrumentation circuits
To provide a stable voltage reference in digital circuits

What is the primary function of a comparator?

To compare two input voltages and produce a high or low output (A) Signup and view all the answers

What is the typical dropout voltage for the 78XX series of voltage regulators?

2V (D) Signup and view all the answers

Which of the following is a characteristic of operational amplifiers (Op-Amps)?

They have a high voltage gain (D) Signup and view all the answers

What is the primary function of a current sense amplifier?

To measure current flow through a shunt resistor (A) Signup and view all the answers

What is the primary limitation of linear voltage regulators like the 78XX series?

All of the above (D) Signup and view all the answers

What is the primary advantage of SMPS over traditional linear power supplies?

Higher efficiency and minimized power dissipation (A) Signup and view all the answers

What is the purpose of the switching transistor/MOSFET in an SMPS?

To switch the DC voltage on and off at high frequency (A) Signup and view all the answers

What is the formula to calculate the output voltage of a 78XX series voltage regulator?

Vout = Vin - Vdropout (C) Signup and view all the answers

What is the function of the feedback circuit in an SMPS?

To monitor the output voltage and adjust the duty cycle (A) Signup and view all the answers

Why is a heat sink required in some applications of the 78XX series voltage regulators?

To dissipate excess heat generated by the regulator (C) Signup and view all the answers

What is the purpose of the transformer in an SMPS?

To transform the voltage to a higher or lower level and provide galvanic isolation (B) Signup and view all the answers

In which of the following applications is SMPS not commonly used?

Aerospace systems (A) Signup and view all the answers

What is the primary function of a Voltage-Controlled Oscillator (VCO)?

To produce an oscillating output whose frequency can be controlled by an input voltage (D) Signup and view all the answers

What is the primary advantage of Switched Mode Power Supplies (SMPS) over traditional linear power supplies?

Efficiency and compact size (B) Signup and view all the answers

Which of the following is NOT a functional block of the LM723 voltage regulator?

Analog-to-Digital Converter (A) Signup and view all the answers

What is the main function of the Comparator component in the 555 timer IC?

To monitor the voltage at the Trigger and Threshold inputs (A) Signup and view all the answers

What is the primary function of a Pulse Width Modulation (PWM) generator?

To produce a PWM signal for applications like motor speed control and LED dimming (B) Signup and view all the answers

In what mode can the 555 timer IC be used to generate a single, precise pulse in response to an external trigger?

Monostable Multivibrator (B) Signup and view all the answers

What is the primary application of a Phase-Locked Loop (PLL)?

Frequency synthesis (A) Signup and view all the answers

Which of the following is a common application of the LM723 voltage regulator?

Power supply regulation (B) Signup and view all the answers

In a monostable multivibrator, what determines the pulse width?

The external RC circuit (B) Signup and view all the answers

What is the purpose of the Voltage Divider component in the 555 timer IC?

To provide a reference voltage for the internal comparator (D) Signup and view all the answers

What is the functionality of the 555 timer IC when configured as a Frequency Divider?

Divides the input frequency by 2 (D) Signup and view all the answers

What is the primary function of an Analog Multiplier/Divider?

To multiply or divide two analog signals (C) Signup and view all the answers

What is the primary function of a Phase-Locked Loop (PLL) system?

To generate an output signal that is phase-locked to the input reference signal (B) Signup and view all the answers

What is the purpose of the low-pass filter (LPF) in a PLL system?

To remove high-frequency components and leave only the DC component (C) Signup and view all the answers

What is the IC 565 commonly used as?

A phase-locked loop (PLL) integrated circuit (D) Signup and view all the answers

Which component of the IC 565 is voltage-controlled?

VCO (C) Signup and view all the answers

What is the function of the internal filter in the IC 565 PLL?

To process the phase detector output (D) Signup and view all the answers

In which type of circuits can the IC 565 PLL be used for motor speed control?

Motor control circuits (B) Signup and view all the answers

What is a specified feature of the lock range and capture range of the IC 565 PLL?

It indicates the frequency range for locking and acquiring lock (A) Signup and view all the answers

How is frequency multiplication achieved using the 565 PLL?

By using a phase-locked loop (D) Signup and view all the answers

For which purpose is the PLL often utilized in digital communication systems?

Clock recovery (B) Signup and view all the answers

What role does the phase detector play in the IC 565 PLL?

Utilizes phase/frequency detection (D) Signup and view all the answers

In what application can the 565 PLL be used for audio tone decoding?

Communication systems (D) Signup and view all the answers

Which function does the IC 565 PLL serve in data synchronization applications?

Synchronization of data signals (D) Signup and view all the answers

What distinguishes the lock range from the capture range in the IC 565 PLL?

Lock range specifies maintaining lock, capture range specifies acquiring lock (C) Signup and view all the answers