Hi
I use the circuit in the picture below to convert a DC signal from [-24V=>24V] range to [0=>1.8V] range
I have two questions:
1)When I simulated it in ISIS I found that it gives me the right results only if Vee=-Vdd that is mean if I connect Vee to GND it gives me wrong results I can't understand why can anyone give me an explanation?
2) I need to use an adjustable resistance (timmer resistors) to make the output in the right range after realisation and it is generally the one which has the lowest value which means 1K but in this case I have 4 resistances unless of 2 so did I need to replace both of 1k resistances with adjustable ones or replacing just one is sufficient and if it is just one what is better replacing R8 or R10 and why?
Thank you.
I use the circuit in the picture below to convert a DC signal from [-24V=>24V] range to [0=>1.8V] range
I have two questions:
1)When I simulated it in ISIS I found that it gives me the right results only if Vee=-Vdd that is mean if I connect Vee to GND it gives me wrong results I can't understand why can anyone give me an explanation?
2) I need to use an adjustable resistance (timmer resistors) to make the output in the right range after realisation and it is generally the one which has the lowest value which means 1K but in this case I have 4 resistances unless of 2 so did I need to replace both of 1k resistances with adjustable ones or replacing just one is sufficient and if it is just one what is better replacing R8 or R10 and why?
Thank you.