Linear Integrated Circuits: Common Types and Applications

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What is the primary function of voltage regulators?

To amplify low-level signals with high common-mode rejection
To provide a stable output voltage regardless of changes in input voltage or load conditions (correct)
To compare two input voltages and produce an output
To measure current flow through a shunt resistor and provide a proportional voltage output

What type of linear IC is designed for amplifying low-level signals with high common-mode rejection?

Current Sense Amplifiers
Voltage Regulators
Instrumentation Amplifiers (correct)
Operational Amplifiers (Op-Amps)

What is the primary application of current sense amplifiers?

Active filters
Power management (correct)
Signal conditioning
Threshold detectors

What type of linear IC can be used in various configurations, including inverting/non-inverting amplifiers, integrators, and differentiators?

Operational Amplifiers (Op-Amps) (B) Signup and view all the answers

What is the primary function of comparators?

To compare two input voltages and produce a high or low output depending on their relative magnitudes (B) Signup and view all the answers

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

To regulate the output voltage for a wide range of input voltages (D) Signup and view all the answers

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

2V (C) Signup and view all the answers

What is the maximum current that the 7805 regulator can handle?

1A (C) Signup and view all the answers

Why do linear regulators like the 78XX series require a heat sink in high current applications?

To dissipate excess voltage as heat (D) Signup and view all the answers

What is the purpose of the 79XX series of voltage regulators?

To regulate the output voltage for negative voltage regulation (A) Signup and view all the answers

What is the primary function of a Voltage Reference Generator in the LM723 voltage regulator?

To generate a stable reference voltage (C) Signup and view all the answers

Which of the following is NOT a common application of the LM723 voltage regulator?

Audio Systems (A) Signup and view all the answers

What is the purpose of the Error Amplifier in the LM723 voltage regulator?

To compare the reference voltage with the feedback voltage (C) Signup and view all the answers

What is the function of the Series Pass Element (Power Transistor) in the LM723 voltage regulator?

To adjust the output voltage based on the error signal (C) Signup and view all the answers

What is the purpose of the Current Limiting feature in the LM723 voltage regulator?

To protect the regulator and the load from excessive current (B) Signup and view all the answers

What is the primary advantage of Switched Mode Power Supplies (SMPS) in automotive electronics?

Compact size and high efficiency (A) Signup and view all the answers

In an astable multivibrator configuration, what is the primary function of the 555 timer IC?

Producing a continuous square wave output (B) Signup and view all the answers

What is the primary application of the 555 timer IC in pulse width modulation (PWM)?

Motor control and dimming applications (A) Signup and view all the answers

What is the function of the voltage divider in the 555 timer IC?

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

In which mode can the 555 timer IC be used as a frequency divider?

Toggle mode (D) Signup and view all the answers

What is the primary function of the phase detector in the 565 IC?

To detect phase differences between input signals (D) Signup and view all the answers

What determines the frequency of the Voltage-Controlled Oscillator (VCO) in the 565 IC?

External timing resistor and capacitor (C) Signup and view all the answers

What is the purpose of the internal filter in the 565 IC?

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

What is the range over which the 565 PLL can maintain lock?

Lock range (B) Signup and view all the answers

What is one application of the 565 PLL in communication systems?

Clock recovery (B) Signup and view all the answers

What is the advantage of using a PLL in frequency synthesizers?

Generation of stable and accurate output frequencies (C) Signup and view all the answers

In what type of application is the 565 PLL used for decoding audio tones?

Audio tone decoding (B) Signup and view all the answers

What is the purpose of the 565 PLL in motor control circuits?

Speed control (D) Signup and view all the answers

In what type of system is the 565 PLL used for data synchronization?

Communication systems (B) Signup and view all the answers

What is a key feature of the 565 PLL that makes it versatile?

Its ability to lock onto and track a specific frequency or phase (A) Signup and view all the answers

What components are responsible for smoothing the rectified DC voltage in a Switched Mode Power Supply (SMPS)?

Filter capacitor and output filter (C) Signup and view all the answers

Why is Switched Mode Power Supply (SMPS) known for its high efficiency compared to linear power supplies?

By minimizing power dissipation in the active switching components (A) Signup and view all the answers

In an SMPS, which component plays a crucial role in controlling the power flow by switching the DC voltage on and off at high frequency?

Switching transistor/MOSFET (A) Signup and view all the answers

What role does the feedback circuit play in a Switched Mode Power Supply?

It adjusts the switching transistor's duty cycle to maintain a constant output (C) Signup and view all the answers

Why can SMPS be more compact and lightweight compared to linear power supplies?

As a result of higher efficiency and reduced heat dissipation (C) 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 does the 555 timer act as a flip-flop, maintaining one of two stable output states until triggered to switch to the other state?

Bistable (A) Signup and view all the answers

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

To filter the output of the phase detector to remove high-frequency components (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 (C) Signup and view all the answers

What is the function of the voltage-controlled oscillator (VCO) in a Phase-Locked Loop (PLL) system?

To generate an output signal whose frequency is directly proportional to the input voltage (A) Signup and view all the answers