[sdiy] op amp phase inversion

[John L Marshall]

Patchell & I have been talking of using an RS-232 receiver, MC1489, if that
fits your application.

Take care,
John
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----- Original Message ----- 
From: "Czech Martin" <Martin.Czech at micronas.com>
To: <jhaible at debitel.net>
Cc: "Sdiy (E-mail)" <synth-diy at dropmix.xs4all.nl>
Sent: Monday, May 26, 2003 5:40 AM
Subject: RE: [sdiy] op amp phase inversion


> simple amplifier and/or comparator,
> e.g. gain of 1.0 or 300mV threshold with some 10mV hysteresis,
> frequency 1mHz-20Hz. +-15V supply.
>
> m.c.
>
> -----Original Message-----
> From: jhaible at debitel.net [mailto:jhaible at debitel.net]
> Sent: Montag, 26. Mai 2003 14:20
> To: Czech Martin
> Cc: Sdiy (E-mail)
> Subject: RE: [sdiy] op amp phase inversion
>
>
> > can you please recomend a quad op amp that does not latch
> > and will not be disturbed with high differential input voltage
> > when abused as comparator?
> > and is available even at radio shack like stores?
> >
> > RC4136 seems to share 741 topology, any other?
> >
> > It can be very slow, and input current or offset voltage
> > can be bad, also (1uA, 5 mV).
>
>
> I've used RC4136's recently, because I needed noninverting,
> latch-free audio amps in quad package.
> I'm not sure if Vos is < 5mV, though.
>
> What is your application?
>
> JH.
>
>
>
>
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