volt controlled synthetic capacitor?

[Paul Perry]

The annoying thing about the ICL8038 is that it doesn't
quite cover the full audio range in one voltage sweep 
with a fixed capacitor/resistor.
But if the cap or resistor was in some way to change,
at the same time as the sweep voltage, and in the right 
direction, then perhaps it would.
Is there a simple/easy/obvious way to do this?
All I want is a one chip sin oscillator that goes from say 0.1 Hz to 
20KHz with say 0 to 5 volt control voltage.... 

please dont tell me not to use the ICL8038, I know that already,
but I have a whole shitload of them andI cant afford Maxim anything....

BTW, is there a cit\rcuit that 'synthesises' a capacitor the way a 
gyrator synthesises an inductor?

paul perry melbourne australia going to bed and hoping to find wit
and wisdom from this list tomorrow ;)