| 摘要 |
<p>An oscillator 1 for generating an overall output oscillating signal 8 whose frequency f8 is substantially stable over a predetermined temperature range and voltage supply range, the oscillator 1 comprising a voltage regulation portion 5 for generating a partially regulated voltage signal 6 from an unstable voltage supply, the partially regulated voltage signal 6 varying in dependence on the ambient temperature of the oscillator 1 in accordance with a first temperature dependency; and a temperature and voltage dependent oscillator portion 7 which is supplied by the partially regulated voltage signal 6, the oscillator portion 7 being adapted for generating an oscillating signal 8 whose frequency f8 varies both in dependence on the ambient temperature of the oscillator 1 in accordance with a second temperature dependency and in dependence on the voltage of the partially regulated voltage signal 6 in accordance with a first voltage dependency, the oscillator portion 7 being arranged such that the effect of the second temperature dependency substantially cancels the combined effect of the first temperature dependency together with the first voltage dependency such that the overall temperature dependency of the oscillator 1, within the predetermined temperature range and voltage supply range, is within a predetermined tolerance. <IMAGE></p> |
