how to find frequency of bode plot in multisim

Start the simulation and measure the frequency of oscillation at the output. Set the time base to 10 ns/Div and Channel 1 to 500 mV/Div as indicated at the top of the display window. Double-click the Oscilloscope to view its display. Double-click the AC voltage source and enter the calculated resonant frequency. Calculate the resonant frequency of the band-stop circuit and note this value in Table 3-1.ģ. Connect the circuit components illustrated in Figure 3-1. Parts AC Voltage Source Resistors: virtual 10 Ω (2) Inductor: virtual 200 µH Capacitor: virtual 220 pFġ. For the first order filter in this experiment the slope should approach 40 dB per decade around the frequency of interest. As in the series bandpass filter, the bandwidth of a LC band-stop circuit is defined by the frequencies between the upper and lower 3 dB points. The cutoff frequency represents 0.707 of the maximum output impedance. This equation relies on the assumption that r1 is resistance inherent to the inductor. The Laplace transform function for Figure 3-1 is given by the following equation. Laplace transform analysis is used to designate the number of poles in a given filter. The total line current leads the applied voltage at frequencies greater than resonance and lags the applied voltage below resonance. At frequencies above resonance, the line current of a band-stop circuit increases while the impedance decreases. At the resonant frequency, the circuit exhibits a phase angle of zero.

This results in zero total current at the resonant frequency since equaling produces equal inductive and capacitive current branches.

It features a sharp increase in net impedance at the resonant or center frequency. An LC band-stop circuit distinguishes itself from a series LC circuit by its parallel arrangement. Hence, the term “tuned circuit” is interchangeable with the term “resonant circuit”. Tuned circuits are heavily used in receivers as they amplify certain frequencies at resonance. The passive band-stop circuit consists of a parallel LC network and requires a load in order to utilize its effectiveness in practice.

Experiment 3: The Passive Band-Stop Circuit with Load Purpose and Discussion The purpose of this simulation is to demonstrate the characteristics and operation of a passive band-stop circuit.

How to find frequency of bode plot in multisim