You would not normally want to use an LM741 in single supply mode. The main reason is the output won't go anywhere NEAR ground in single supply mode. The LM741 should always be used with a bipolar power supply. The output should be able to get 2.5 to 3 volts from either rail. I would suggest ±8-9 volts minimum for using this part.It's quote from a Circuits Digest article on using Op Amps as Schmitt Triggers. Op Amp being used in this article is the LM741 but could be any dual PS input op amp.
https://circuitdigest.com/electroni...t-using-op-amp-for-high-speed-digital-signals
The schematic confirms that the intent of the circuit is to run with one supply rail plus GND.
So to use any dual supply op amp as a single supply the - side has to be grounded? Makes sense...one supply rail plus GND.
Actually, it isn't.If the op amp such as LM358 is a single supply variety
I'd understand that as 12V and 0V. If I wanted to say that it was powered by ±12V, I'd say "The op-amp is powered by ±12V rails" (plural). To be perfectly clear, in the 12V/0V case one could say "The op-amp is powered by a single 12V rail". Sometimes complete clarity only requires one extra word!"The Op Amp is powered by a 12V rail". Does that mean ±12V (assume so), or only +12V, or ±6V?
Hi Sam,It's quote from a Circuits Digest article on using Op Amps as Schmitt Triggers. Op Amp being used in this article is the LM741 but could be any dual PS input op amp.
Not all op-amps can be used as Schmitt triggers, some have input protection diodes (NE5534 for instance) which conduct if there is a difference of more than ±600mV between inputs.It's quote from a Circuits Digest article on using Op Amps as Schmitt Triggers. Op Amp being used in this article is the LM741 but could be any dual PS input op amp.
https://circuitdigest.com/electroni...t-using-op-amp-for-high-speed-digital-signals
Or the + side. The opamp has no intrinsic opinion. It will run just fine with V+ connected to GND and V- connected to -24 V (or whatever). It all depends on the input and output signal voltage ranges.So to use any dual supply op amp as a single supply the - side has to be grounded? Makes sense...
True. I have several types of op amps in my stock but no comparators. What would you recommend having on hand?What you really need is a comparator
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