Tempcos was: Re: New(?) ideas for the new year

[Rene Schmitz]

At 08:17 08.01.1998 +0100, you wrote:
>I heard the amateur radio people do this sometimes, put the whole
>oscillator circuitry into the thermostat oven.  Using a transistor
>array like CA4046 with build in heater transistor is a good idea, but
>they seem to have poor matching, poor Hfe, poor Re, so they are not
>suitable for large range exponential converters as stand alone
>solution. If you use a DAC with autotune table, this could be corrected
>however.
>
>m.c.
As I said in the previous post, I use them in my compensation amplifier, 
and they seem to work very well, I used a HF-trimpot and have very good 
linearity. The matching is within 5mV, i use CA3086s which are really the 
same thing. I think its something like 15-20 octaves, that should be sufficient.

=(uzs159 at uni-bonn.de)========================
             ,          : 
|") [" |\ | ["          :   This space 
|"\ [_ | \| [_          :   intentionally   
                        :   left blank
                        :
=(http://www.uni-bonn.de/~uzs159)============