Crystal oscillator with fast start-up and low current consumption

摘要

The oscillator has a resonator (10) coupled between an input and an output of an inverter. An external transistor (MP2) is coupled in a current mirror mode with an inverter transistor (MP1). A drain terminal and a gate terminal of the external transistor are coupled to a gate terminal and a drain terminal of inverter transistor, respectively. A current source (34) is coupled to the gate terminal of inverter transistor. A switch (S) is configured to interrupt current in external transistor. Independent claims are included for the following: (1) method of starting crystal resonator oscillator; and (2) method of making oscillator.