21.20(a) is mostly called the Pierce crystal. The resulting circuit frequency of oscillations is about because of the sequence resonant frequency of your crystal. Variants in source voltage, transistor parameters, etc. have no impact on the circuit functioning frequency and that is held stabilized because of the crystal. The circuit https://waylonnbqes.blogdiloz.com/33919973/the-greatest-guide-to-timing-components-for-consumer-electronics