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Papabravo said:Using that part there is no method that I know of.
meera83 said:i m using LM317 regulator, may i know that what kind of method i can use in order to get voltage <1, since for the data sheet write that the minimum voltage range will be 1.25V..
thanks...
The output of an old LM324 quad opamp or an old LM358 dual opamp goes to ground if it has a single supply voltage.mneary said:How much current do you need? If it's less than about 200 mA, I would use the obsolete and extremely cheap LM324 (or TL072) driving a 2N2222 in emitter follower configuration.
Although the TL07x won't sink useful current closer than 1V from ground, it stops sourcing as well. This meets the 1V output requirement. It might need a pull-down resistor, though.The output of a TL07x does not go to ground, it goes to about 1V above ground if it has a single supply voltage. So adding an emitter-follower will not produce an output down to ground.
meera83 said:i m using LM317 regulator, may i know that what kind of method i can use in order to get voltage <1, since for the data sheet write that the minimum voltage range will be 1.25V..
thanks...
There are two problems with that circuit.ronsimpson said:I can see you do not have a negative voltage so: see attached file.
You must choose the correct op-amp. Most op-amps will not work with their inputs near the same voltage as the supply pins. ( If the power supply is 0 to 12 volts then many will not work if either input is less then 2 volts or more than 10 volts.) You need to look for an op-amp that has a “common mode input voltage” that includes the negative supply. There are some amps like that, you might start out looking at MicroChip for low voltage op-amps.