| 摘要 |
A temperature controlled crystal oscillator circuit comprising an amplifier (12) having a feedback path including a crystal (26) and a frequency pulling element (28), and a temperature compensating voltage generating means (30) coupled to the frequency pulling element (28). The voltage generating means (30) applying a voltage, V comp, generated in accordance with a function V comp = b*exp¢a1(T-T R)!+b*exp¢-a2*(T-T R)!+c*(T-T R) where T R is a reference temperature in degrees Kelvin T is the working temperature in degrees Kelvin a1, a2, b and c are constants.
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