Sweep Frequency Generator – Block Diagram and its Workings: A Sweep Frequency Generator is a special type of signal generator which generates a sinusoidal output whose frequency is automatically varied or swept between two selected frequencies. One complete cycle of the frequency variation is called a sweep. The rate at which the frequency is varied can …
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Transistor Current Sweep Circuit: A simple transistor current sweep circuit is given in Fig. 30.143 (a). In the circuit the transistor is employed as an electronic switch and the inductor in series with the transistor is bridged across the supply voltage VCC. The diode forward resistance and the damping resistance are represented by resistor Rd …
Miller Sweep Circuit and Miller Bootstrap Sweep Circuit: The basic R-C sweep circuit is shown in Fig. 30.134, in which opening of switch S provides sweep voltage, as already explained earlier. The waveform generated by this basic circuit is not exactly linear, even if the ratio of sweep voltage Vs and the supply voltage V …
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Sawtooth Voltage Generator Circuit Diagram and Waveforms: Figure 30.129 represents a basic sawtooth voltage generator. Switch S periodically changes its position from point 1 to point 2 (although a mechanical switch is shown in the circuit, the switching action is actually performed electronically by means of a separate circuit not shown here). The switching action …
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Methods of Sweep Voltage Generation: It is not possible to achieve precise linearity in sweep voltages by electronic means, various methods of sweep voltage generation are enumerated below. 1. Exponential Charging: In this method of time-base waveform generation, a capacitor is charged exponentially through a resistor from a constant voltage source to a voltage quite …
Time Base Generator – Working Principle and Types: Time base is an axis, normally X-axis, that is used to represent time so that variations of quantities such as voltages, currents etc., or their waveforms can be plotted w.r.t. time. Most of the CRO applications involve measurement or display of a quantity which varies with respect …
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Peak to Peak Detector – Working Principle and Applications: A half-wave rectifier with a capacitor-input filter provides a dc output voltage roughly equal to the peak of the input signal. The same circuit with a small-signal diode is known as a peak detector. Typically, peak detectors operate at frequencies that are much higher than 50 …
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Clamping Circuit Theorem: Under steady-state conditions, for any input waveform, the shape of the output waveform of a clamping circuit is fixed and also the area in the forward direction and the area in the reverse direction are related. According to clamping circuit theorem, under steady-state conditions, the ratio of area in forward direction Af …
Diode Clamping Circuit – Positive and Negative Clamping: Diode Clamping Circuit – A circuit that places either the +ve or -ve peak of a signal at a desired level is known as a clamping circuit. It simply adds or subtracts a dc component to the input signal. In steady state, the output waveform is an …
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What is Comparator in Electronics? – Classification and Applications A circuit used to mark the instant when an arbitrary waveform attains some particular reference level is called a comparator. The clipping circuits can also be used to perform the operation of comparison. In this case the circuits become elements of a comparison system. The only …
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