[sdiy] op amp phase inversion

[Scott Gravenhorst]

What a cool idea, and I have some of these!

"John L Marshall" <john.l.marshall at gte.net> wrote:
>Patchell & I have been talking of using an RS-232 receiver, MC1489, if that
>fits your application.
>
>Take care,
>John
>------------------------------------------------------------------
>Pacific Northwest Synthesizer Meeting
>August 9, 2003
>www.sound-photo.com
>------------------------------------------------------------------
>
>----- 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.
>>
>>
>>
>>
>> -------------------------------------------------
>> debitel.net Webmail
>>
>

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