Talk:Operational amplifier
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Timeline - FET OPs
editIn the timeline the point under 1970s about FET OPs is a bit confusing and vague. The early FET OPs were JFET based as hybrids - so seprate chips for the JFETs at the input and the main part. Later came JFET based monolytic OPs and also CMOS based monolytic OPs. CMOS OPs got a lot more popular, espeically for low votlage use, but have not fully replaced monolytic JFET input OPs - only for a few super low bias applications. Relevant milestones may be the first monolytic JFET input OP and CMOS OP - could be problematic if the early ones were rare, special ones. --Ulrich67 (talk) 18:02, 3 February 2021 (UTC)
First produced
editThe first produced year seems to be for the 741, but that wasn't the first opamp. The uA702 was released in 1963, which was probably the first monolithic opamp. But there were opamps before that. 72.74.174.182 (talk) 03:48, 5 January 2023 (UTC)
- The 741 was released in 1968. I'm not sure what the 1967 year refers to. Craig Stuntz (talk) 17:21, 29 March 2023 (UTC)
"First produced"
editThe article currently has "First produced" in the infobox set to 1967, which seems odd to me, as this year is not the date of the first op amp, first commercial op amp, first IC op amp, or the op amp pictured directly above. I am not sure which of these things "First produced" is supposed to refer to, but in any event the date seems wrong? Craig Stuntz (talk) 17:18, 29 March 2023 (UTC)
- Agreed and removed. Constant314 (talk) 18:10, 29 March 2023 (UTC)
- There were op-amps produced with discrete transistors, sometimes molded into a plastic block. Maybe even after ICs, as they might be lower noise or otherwise better. But I don't know any dates. Gah4 (talk) 07:13, 26 March 2024 (UTC)
zero offset
editThe offset could be specified as an input offset voltage (to get zero output), or output voltage with zero input. I don't know that one is better, which might be why the statement in the recent edit isn't so obvious. Gah4 (talk) 07:15, 26 March 2024 (UTC)
SVG are impossible to see in Dark theme
editIt seems black lines on transparent background in dark themed viewers causes the lines to be black on black background. 32.221.197.108 (talk) 13:50, 25 May 2025 (UTC)
- Please give an example. Either link to the section (example: Operational amplifier#Positive-feedback applications) or quote some text (example: "Schmitt trigger implemented by a non-inverting comparator"). Johnuniq (talk) 04:18, 26 May 2025 (UTC)
CS1 parameters
editI made a recent edit to fix a CS1:maint error. While the fix might not be correct, the previous one is obviously wrong, as it has an error. I am accused of misusing a CS1 parameter. If there is a better one, please use it. But it seems that postscript= is wrong, as it gets an error message. I thought via= was close, but maybe not. Gah4 (talk) 19:11, 21 June 2025 (UTC)
- OK, seems to be fixed now. The postscript= parameters is supposed to be either one character, or the word none. I thought via= was close, but didn't know about id= or series=. Thanks for fixing it, though. Gah4 (talk) 19:22, 21 June 2025 (UTC)