32KHz oscillator architecture with < 1uA current.

[haribabu]

Hi All,
Can anyone suggest me on choosing to architecture for 32KHz oscillator with targeted current consumption < 1uA. As a first cut I have taken the architecture from Vittoz paper on 'High Performance Crystal oscillator circuits'. Are there any other architectures ? .

Thanks
Hari.

 

[keith1200rs]

Hari,

The best one I have seen is probably "Proceedings of the 25th European Solid-State Circuits Conference, pp. 146 - 149" Sept 1999. Some circuits are well below 100nA.

The following may also be of interest:

JSSC 19 #2 April 1984 P228
JSSC 23 #3 June 1988 P774

Keith