- How does Comparator get high rate of accuracy?
- How does sample and hold circuit work?
- How does the comparator work?
- What is hysteresis voltage?
- What is peak rectifier?
- What is a zero crossing detector?
- Why output of transducer is not directly connected to indicator or display?
- What is comparator and its application?
- What is the function of low pass filter in phase locked loop?
- How does a diode detector function?
- What does a RF detector do?
- How does a clamper circuit work?
- What is the basic principle of VCO?
- What is a peak detector circuit?
- How does a peak detector work?
- What happens when VCO output is 90o out of phase with respect to input signal?
- What is a detector circuit?
How does Comparator get high rate of accuracy?
How to obtain high rate of accuracy in comparator.
Explanation: High voltage gain causes comparator output voltage to switch between saturation levels.
High CMRR rejects noise at input terminal and input offset (voltage & current) help to keep changes in temperature variation very slight..
How does sample and hold circuit work?
In electronics, a sample and hold (also known as sample and follow) circuit is an analog device that samples (captures, takes) the voltage of a continuously varying analog signal and holds (locks, freezes) its value at a constant level for a specified minimum period of time.
How does the comparator work?
A comparator circuit compares two voltages and outputs either a 1 (the voltage at the plus side; VDD in the illustration) or a 0 (the voltage at the negative side) to indicate which is larger. Comparators are often used, for example, to check whether an input has reached some predetermined value.
What is hysteresis voltage?
The difference between the positive-going and the negative-going input threshold voltages.
What is peak rectifier?
Chapter 3 – Diodes and Rectifiers A peak detector is a series connection of a diode and a capacitor outputting a DC voltage equal to the peak value of the applied AC signal.
What is a zero crossing detector?
A zero-crossing detector or ZCD is one type of voltage comparator, used to detect a sine waveform transition from positive and negative, that coincides when the i/p crosses the zero voltage condition. … The applications of the Zero Crossing Detector are phase meter and time marker generator.
Why output of transducer is not directly connected to indicator or display?
Why output of transducer is not directly connected to indicator or display? Explanation: Many transducers do not produce output with sufficient strength to permit there use directly. Therefore, the low level output signal of transducer need to be amplified.
What is comparator and its application?
Comparator Circuit Working and Applications. Generally, in electronics, the comparator is used to compare two voltages or currents which are given at the two inputs of the comparator. That means it takes two input voltages, then compares them and gives a differential output voltage either high or low-level signal.
What is the function of low pass filter in phase locked loop?
A Low Pass Filter (LPF) is used in Phase Locked Loops (PLL) to get rid of the high frequency components in the output of the phase detector. It also removes the high frequency noise.
How does a diode detector function?
A Diode Detector is the simplest way of demodulating AM signals. It operates by detecting the envelope of the incoming signal which it does by rectifying the signal. Current is allowed to flow through the diode in only one direction, giving either the positive or negative half of the envelope at the output.
What does a RF detector do?
An RF detector monitors or samples the output of an RF circuit and develops a dc output voltage proportional to the power at that point. … RF detectors are used primarily to measure and control RF power in wireless systems.
How does a clamper circuit work?
A clamper circuit shifts the DC level or the reference level of the signal to the desired level without changing the shape of the waveform. … Some times the biasing voltage is also added with the clamper circuit to shift the DC level to the desired voltage level.
What is the basic principle of VCO?
The applied input voltage determines the instantaneous oscillation frequency. Consequently, a VCO can be used for frequency modulation (FM) or phase modulation (PM) by applying a modulating signal to the control input. A VCO is also an integral part of a phase-locked loop.
What is a peak detector circuit?
A peak detector circuit is a circuit that is able to measure the peak amplitude that occurs in a waveform. It is able to tell us what’s the highest value a waveform reaches. It is important because it can measure the maximum amplitude value of a signal.
How does a peak detector work?
Peak detectors capture the extreme of the voltage signal at its input. … Ideally the output of the peak detector circuit tracks or follows the input voltage until the extreme point is reached but holds that value as the input decreases. The ideal peak detector performs this function regardless speed of the input signal.
What happens when VCO output is 90o out of phase with respect to input signal?
What happens when VCO output is 90o out of phase with respect to input signal? Explanation: The error voltage is zero when the phase shift between the two inputs is 90o. So, for the perfect lock, the VCO output should be 90o out of phase with respect to the input signal. 3.
What is a detector circuit?
In radio, a detector is a device or circuit that extracts information from a modulated radio frequency current or voltage. … This is its current meaning, although modern detectors usually consist of semiconductor diodes, transistors, or integrated circuits.