Search found 31 matches
- Fri Jul 15, 2022 11:21 am
- Forum: Pro Audio Design
- Topic: Discrete Op Amp clipping behavior
- Replies: 6
- Views: 19544
- Fri Jul 15, 2022 11:19 am
- Forum: Pro Audio Design
- Topic: Discrete Op Amp clipping behavior
- Replies: 6
- Views: 19544
Re: Discrete Op Amp design
What you describe is phase reversal which occurs when the common mode voltage is exceeded. There are many newer enhanced versions of older opamps that the datasheet indicates as not having phase reversal. The TL072 datasheet is one example. You will definitely see this on a general purpose part suc...
- Fri Jul 15, 2022 11:18 am
- Forum: Pro Audio Design
- Topic: Discrete Op Amp clipping behavior
- Replies: 6
- Views: 19544
Re: Discrete Op Amp clipping behavior
I had somebody point me to the OPA4197 datasheet because there was a description of this behavior that sounded similar. In the datasheet it is called Phase Reversal - "Many op amps exhibit a phase reversal when the input is driven beyond its linear common-mode range. This condition is most ofte...
- Fri Jul 15, 2022 9:35 am
- Forum: Pro Audio Design
- Topic: Discrete Op Amp clipping behavior
- Replies: 6
- Views: 19544
Discrete Op Amp clipping behavior
I'm working on a simple discrete Class-A op amp. This isn't the first time I have worked on a discrete amplifier but there is a clipping behavior I would like to dig into this time. The amplifier design is simple - run of the mill input differential pair, single transistor VAS (active or bootstrap l...
- Fri Oct 08, 2021 1:57 pm
- Forum: Document
- Topic: "Low Noise Electronic Design," Motchenbacher and Fitchen, 1973
- Replies: 9
- Views: 50132
- Fri Oct 08, 2021 1:49 pm
- Forum: Document
- Topic: "Low Noise Electronic Design," Motchenbacher and Fitchen, 1973
- Replies: 9
- Views: 50132
Re: "Low Noise Electronic Design," Motchenbacher and Fitchen, 1973
I was also able to get something going by applying the positive DC voltage to transistor base...duh.
- Fri Oct 08, 2021 1:47 pm
- Forum: Document
- Topic: "Low Noise Electronic Design," Motchenbacher and Fitchen, 1973
- Replies: 9
- Views: 50132
Re: "Low Noise Electronic Design," Motchenbacher and Fitchen, 1973
ok.
I'm aware of the positive DC potential at the non-inverting input of the amplifier in figure b.
I was able to get something going with a negative DC potential at the non-inverting input of the amplifier in figure a.
This looks like a fun circuit to play with...
I'm aware of the positive DC potential at the non-inverting input of the amplifier in figure b.
I was able to get something going with a negative DC potential at the non-inverting input of the amplifier in figure a.
This looks like a fun circuit to play with...
- Fri Oct 08, 2021 10:04 am
- Forum: Document
- Topic: "Low Noise Electronic Design," Motchenbacher and Fitchen, 1973
- Replies: 9
- Views: 50132
Re: "Low Noise Electronic Design," Motchenbacher and Fitchen, 1973
I tried simulating the inverting amplifier with no luck.
What am I missing?
What am I missing?
- Fri Nov 01, 2019 11:23 am
- Forum: Test, Measurement and Repair
- Topic: APx500 Flex Audio Analyzer
- Replies: 7
- Views: 55793
Re: APx500 Flex Audio Analyzer
I agree. Pricing for this does not make sense.
- Thu Oct 31, 2019 10:55 am
- Forum: Test, Measurement and Repair
- Topic: APx500 Flex Audio Analyzer
- Replies: 7
- Views: 55793
Re: APx500 Flex Audio Analyzer
Doesn't really matter to me.
Both are out of reach for me.
Good deal or not - AP has some clout and name recognition throughout the audio industry (pro, consumer, hi-fi, etc.)
Both are out of reach for me.
Good deal or not - AP has some clout and name recognition throughout the audio industry (pro, consumer, hi-fi, etc.)