Could a dual power supply for opamps be simulated by using a single DC source and 2 1k resistors, one from DC source to +Vcc, and one from -Vcc to ground?
I'm sorry, but I've no idea what you're on about? - could you post a diagram of what you're trying to do?.Thank you for those very useful references. However these schematics use a voltage divider to create an offset on the inputs. My question was rather about balancing the entire opamp between Vcc and ground by using two resistors in the power supply lines (Vcc and ground). A 741 needs about 3mA, so what about 2x 100 Ohms or lower? Would that be electrically correct?
Sorry, still makes no sense - as your schematic doesn't - all it shows is 47 ohms in the power connections?.Schematic attached. This is for a filter testboard. My issue is with the use of R1 and R2: would that be an acceptable means to create an offset for incoming AC signals on Vin?
I refer you again to the sticky which shows both AC and DC connections, along with single and dual supplies.The issue is that when I apply an AC voltage (with reference to "ground") to an input of an opamp with +Vcc connected to the supply pin, and "ground" connected to the groundpin, then only half wave signals appear on the output (the negative part of the AC wave being suppressed by the opamp connected to "ground").
Hi Nigel, yes I understand what you say; my question however refers to a possible alternative way of obtaining a full wave output when using a single power supply; besides the solutions described in this sticky.I refer you again to the sticky which shows both AC and DC connections, along with single and dual supplies.
And how do you expect leaving out all the required parts that make a circuit is going to help?.Hi Nigel, yes I understand what you say; my question however refers to a possible alternative way of obtaining a full wave output when using a single power supply; besides the solutions described in this sticky.
No, to be blunt.Now my theory is that if Vcc is connected to the opamp Vcc pin but with a (for example) 47R resistor in series; and the opamp ground pin connected to a 47R resistor in series to ground then the opamp should in theory be clamped halfway between Vcc and ground