AN2867 Application note - STMicroelectronics
is the anti-resonant frequency when impedance Z tends to infinity. Using equation (1), it is expressed as follows: Fa Fs 1 Cm C0 = + -----The region delimited by F. s. and F. a. is usually called the area of parallel resonance (shaded area in . Figure 2). In this region, the crystal operates in parallel resonance and behaves as
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