[time-nuts] Improving the stability of crystal oscillators

[Neville Michie]

On 11/10/2007, at 10:23 PM, Bruce Griffiths wrote:


> If one uses resistive heating then some linearisation improves the
> performance as the heat from the heating element is proportional to  
> the
> square of the voltage across the heating element.
>

If you use a transistor as a heater, the full supply voltage is  
across the
element all the time, so heating is proportional to the current flowing.

Neville