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How is a series RC network acting as a lead network & a parallel RC combination acting as a lag network ?
A lead-lag network is a type of electronic circuit that is used to control the timing or phase of a signal. It is made up of both resistive (R) and capacitive (C) elements arranged in either series or parallel combinations.
In a series RC combination, the resistor (R) and capacitor (C) are connected in a series circuit. The resistor limits the flow of current while the capacitor stores and releases charge. This combination can be used to introduce a phase shift in a signal, with the amount of shift determined by the values of the resistor and capacitor.
A parallel RC combination is used in a lead-lag network to create a filter that can attenuate certain frequencies in a signal. The capacitor and resistor are connected in parallel, with the resistor providing a path for the unwanted frequencies to bypass the circuit while the capacitor blocks them.
Lead-lag networks are commonly used in electronic circuits to control the timing or phase of signals, as well as to filter out unwanted frequencies. They are also used in power supplies to smooth out fluctuations in the output voltage.
The time constant of a lead-lag network is the amount of time it takes for the voltage or current in the circuit to reach 63.2% of its final value. It can be calculated by multiplying the resistance (R) and capacitance (C) values together, with the unit of time being seconds.