7:29:22 PM
To: "neonixie-l"
Subject: Re: [neonixie-l] LM-324 op amp
If the loop-gain is sufficiently low, any non-linearities at the output
will get self-corrected (because of the negative feedback) at low-frequency. If
the signal frequency is high-enough, or if th
If the loop-gain is sufficiently low, any non-linearities at the output
will get self-corrected (because of the negative feedback) *at
low-frequency*. If the signal frequency is high-enough, or if there is
low-bandwidth in the feedback network, then the output will definitely
behave
> On Apr 1, 2021, at 8:52 AM, chuckrr wrote:
>
> Doing do on an LM-324 runs the output at around 7.45 volts
> when the chip is operating from a single 9 volt supply.
This reminds me of an aspect of the LM324 worth including in this thread. It's
the kind of real-world issue that doesn't come
s. -Chuck
>
>
> Original Message
> From: "gregebert"
> Sent: 4/1/2021 7:36:20 PM
> To: "neonixie-l"
> Subject: Re: [neonixie-l] LM-324 op amp
>
> An op-amp is a high-gain amplifier, so if both inputs are tied to the same
> voltage, then noise
study is required. At least I now
know a little more
about the proper way to tie off the unused ones. Thanks. -Chuck
Original Message
From: "gregebert"
Sent: 4/1/2021 7:36:20 PM
To: "neonixie-l"
Subject:
An op-amp is a high-gain amplifier, so if both inputs are tied to the same
voltage, then noise will amplified thru the op-amp and cause the output to
jump around. As others have said, this can lead to oscillation. Noise is
not just what is present at the inputs; it's also inherent in the op-amp
> That actually sounds kind of like the old military practice of grounding
> unused TTL inputs through a 1k resistor.
I thought the military practice was to tie unused inputs high (instead of
grounding them) through a resistor: TTL takes less current to pull high than
to pull low.
- John
--
>
> Original Message
> From: "David Forbes"
> Sent: 4/1/2021 10:07:56 AM
> To: "NeoNixie"
> Subject: Re: [neonixie-l] LM-324 op amp
>
>
> Bill,
> That's not a good idea. It is likely to oscillate. See my other reply.
>
>
&g
"NeoNixie"
Subject: Re: [neonixie-l] LM-324 op amp
Bill,
That's not a good idea. It is likely to oscillate.
That actually sounds kind of like the old military practice of grounding unused
TTL inputs through a 1k resistor.
Original Message
From: "Bill van Dijk"
Sent: 4/1/2021 9:40:44 AM
To: neonixie-l@googlegroups.com
Subject: RE: [neonixie-l] LM-324 op amp
Ty the unused inputs
Thank you David. Makes good sense. -Chuck
Original Message
From: "David Forbes"
Sent: 4/1/2021 10:03:25 AM
To: "NeoNixie"
Subject: Re: [neonixie-l] LM-324 op amp
The standa
nection Re: [neonixie-l] LM-324 op amp
Why are you using a 324 Op Amp? Older OpAmps are asking for problems
with instability and common mode input range as well as output swing limits.
I suggest you look at something like the TLV2371 series that is
available
] LM-324 op amp
Bill,
That's not a good idea. It is likely to oscillate. See my other reply.
On Thu, Apr 1, 2021, 6:37 AM Bill van Dijk mailto:theoldpha...@gmail.com> > wrote:
Ty the unused inputs to ground with a 10K resistor, float the unused outputs.
Bill
--
You re
On 2021-04-01 8:52 a.m., chuckrr wrote:
> What is standard procedure for tying off unused op-amp inputs?
>
> If for instance there is a circuit which uses only (2) of the (4) available
> op-amps in a DIP package,
> what is the normal protocol for dealing with these unused units?
>
> Can the
Why are you using a 324 Op Amp? Older OpAmps are asking for problems with
instability and common mode input range as well as output swing limits.
I suggest you look at something like the TLV2371 series that is available
as single, dual, and quad. Inputs and outputs are rail to rail.
Yes, connect
Bill,
That's not a good idea. It is likely to oscillate. See my other reply.
On Thu, Apr 1, 2021, 6:37 AM Bill van Dijk wrote:
> Ty the unused inputs to ground with a 10K resistor, float the unused
> outputs.
>
> Bill
>
--
You received this message because you are subscribed to the Google
The standard way is to connect it as a unity gain buffer. Connect the non
inverting input to Gnd and connect the inverting input to the output.
On Thu, Apr 1, 2021, 5:53 AM chuckrr wrote:
> What is standard procedure for tying off unused op-amp inputs?
>
> If for instance there is a circuit
] LM-324 op amp
What is standard procedure for tying off unused op-amp inputs?
If for instance there is a circuit which uses only (2) of the (4) available
op-amps in a DIP package, what is the normal protocol for dealing with these
unused units?
Can the unused inputs just be left floating
What is standard procedure for tying off unused op-amp inputs?
If for instance there is a circuit which uses only (2) of the (4) available
op-amps in a DIP package,
what is the normal protocol for dealing with these unused units?
Can the unused inputs just be left floating? Doing do on an
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