I have a question on basic electronics. I'm looking at a very simple CMOS RC Circuit around a Schmitt Inverter which creates square waves. Something like this.
Now the frequency of the square waves is a function of the value 1/(R1*C1). Hence the frequency is inversely related to the value of the resistance. High resistance = lower frequency
Is there any configuration of such an RC circuit where the relation is direct instead of inverse? Higher resistance = higher frequency? I was thinking along the lines of having a second resistance and getting to the ration of R1/(R2*C), but I can't figure out the circuit.
My use case for this is when R1 is replaced with a LDR. LDRs increase in resistance when light level goes down, but I would like the square wave frequency to increase instead when the light level goes down.