| 摘要 |
<p>An oscillator circuit (702; 802) comprising first and second resonator terminals (710, 712; 810, 812) for connecting to respective terminals of a resonator (704; 804). The oscillator circuit also comprises a first inverting amplifier (706; 806) connected between the first and second resonator terminals (710, 712; 810, 812) in a first mode of operation; and a back to back pair of second inverting amplifiers (706, 708; 806, 808) connected between the first and second resonator terminals (710, 712; 810, 812) in a second mode of operation. There is also provided a controller configured to compare an operational parameter of the oscillator circuit (702; 802) to a switchover threshold, and switch the oscillator circuit (702; 802) from the first mode of operation to the second mode of operation when the operational parameter exceeds the switchover threshold.</p> |
