I know, i know not a very good title...
But that is exactly my question,is there any issues to using the ancient quad op amp for multiple purposes.
I'll explain, i want to use 1 op amp as a AC coupled non inverting amplifier,it 's ouput fed to input of another op amp as a precision rectifier, it's output fed to the last 2 op amps configured as a VCO.
Why you ask, well it's related to a project i want to do using a audio signal to alter the counting speed of a CD4017.
I was using a 555 w/ the 5 pin coupled to a speaker output through a e- cap, it works buuut not exactly the way i wanted.
One problem i was having was wanting to drive it w/ a much weaker signal hence the first stage amplifier.
The second issue was it was pretty glitchy,i assume it's because of the nature of the AC signal hence rectifier section.
Lastly using the two final amps as a VCO just makes sense to save me from using a 555 along w/ the rest.
I mocked the thing up based on the data sheet on the falstad simulator and it does work.
Buut i know the falstad simulator is crude and uses generic values etc.(still love its simplicity)
My question comes in as i noticed some random glitching on the falstad scope, the generic counter didn't seam to notice them but i think a 4017 would.
Would there be a issue w/ crosstalk or other when using the lm324 in this manner?
If you guys think this will work ill scetch it out and come back to talk about values to set base frequency of the VCO and gain on the amplifier.
All input is appreciated even from Audioguru
Thanks,
-luvv-
But that is exactly my question,is there any issues to using the ancient quad op amp for multiple purposes.
I'll explain, i want to use 1 op amp as a AC coupled non inverting amplifier,it 's ouput fed to input of another op amp as a precision rectifier, it's output fed to the last 2 op amps configured as a VCO.
Why you ask, well it's related to a project i want to do using a audio signal to alter the counting speed of a CD4017.
I was using a 555 w/ the 5 pin coupled to a speaker output through a e- cap, it works buuut not exactly the way i wanted.
One problem i was having was wanting to drive it w/ a much weaker signal hence the first stage amplifier.
The second issue was it was pretty glitchy,i assume it's because of the nature of the AC signal hence rectifier section.
Lastly using the two final amps as a VCO just makes sense to save me from using a 555 along w/ the rest.
I mocked the thing up based on the data sheet on the falstad simulator and it does work.
Buut i know the falstad simulator is crude and uses generic values etc.(still love its simplicity)
My question comes in as i noticed some random glitching on the falstad scope, the generic counter didn't seam to notice them but i think a 4017 would.
Would there be a issue w/ crosstalk or other when using the lm324 in this manner?
If you guys think this will work ill scetch it out and come back to talk about values to set base frequency of the VCO and gain on the amplifier.
All input is appreciated even from Audioguru
Thanks,
-luvv-