Hi Chris, You can invert the COR Logic using a simple transistor or one section of a few different types of IC Chips.
The "A transistor inverter (NOT gate)" portion of the following web page is the circuit you want. http://www.kpsec.freeuk.com/trancirc.htm The values of the resistors can be changed per the type of transistor you select for the task. If you need a plane-jane logic inverter... higher values of resistor Rc can be used to reduce on-time power consumption through the resistor (Rc). Depending on the gain (Hfe) of the transistor you will see values of 4.7K up through 10K often used. Resistor Rb value can also be changed up and down a bit... once again depending on the change found at the transistor collector when the logic on COR signal voltage is available. Hopefully you will see the output voltage change from something near the Vs (supply) value to ground (or the converse) with the COR potential (voltage) applied through Rb to the transistor base. If the inverter circuit loads the circuit you place the input onto... you can swap out the transistor to a 2N7000 (vn10) type fet for much less loading but a min 3vdc required to turn the device (fet) on. To prevent stray RF from causing problems... using 200pf disc caps at the input and output connection points will help. cheers, skipp skipp025 at yahoo.com > "chris_campton" <[EMAIL PROTECTED]> wrote: > Anyone have a circuit diagram to reverse a cor from high > to low to low to high? >
