State and apply the formula for resonant frequency of an a.c. circuit. Identify the characteristics peculiar to a series resonant circuit. Identify the characteristics peculiar to a parallel resonant circuit. State and apply the formula for Q. State what is meant by the bandwidth of a resonant circuit and compute the bandwidth for a given circuit. Identify the four general types of filters.
Many different signals reach the antenna of a radio receiver at the same time.
To select a station, the listener adjusts the tuning dial on the radio receiver until the desired station is heard. A tuned circuit consists of a coil and a capacitor connected in series or parallel. This fact is the principle that enables tuned circuits in the radio receiver to select one particular frequency and reject all others. This is the reason why so much emphasis is placed on X L and X C in the discussions that follow. Examine figure 1-1.