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**ivconic** · 08-22-2024, 12:30 PM

PI3B3253

"Filthy" (1000% ####%%# !!!) integrated circuit!
Does everything I'm interested in have to be really tiny SMD "poo"!?
....also impossible to obrain in local shops!

P.S.
If I ever meet that Murphy... I'll give him a colonoscopy with the tip of my shoe!

**ivconic** · 08-22-2024, 12:43 PM

Come on, good and humane people! Give alms to a poor man... give some suggestion in the form of a DIL case!
74x153, 74x352...I assume they are antediluvian and inferior compared to PI3B3253?

**Skippy** · 08-22-2024, 03:28 PM

Some previous chat about the Tayloe mixer:
The Tayloe Mixer: A Low Noise Solution - Geotech Forums (geotech1.com)

**ivconic** · 08-22-2024, 03:39 PM

2011. I missed that!?
Thanks!

**ivconic** · 08-23-2024, 07:24 AM

I've read the entire thread from post to post (which happens rarely due to my focus and attention span problem).
I see that the topic has not developed. It was mostly debated and compared with the conventional approach of most detectors.
Carl has persistently denied any advantages with arguments that have little to complain about.
Davor tried to think outside the box.
At that time, many had a problem with simulations and simulation models. And so the topic died.
The emphasis was on the ratio of signal to noise, etc. I think the point is missed.
I wasn't drawn to this directly for the noise reduction. Already for other reasons.
Namely, a very simple frontend that outputs chewed I&Q information.
It doesn't take a delicately muscled ADC to translate that information into the digital domain.
We already have 4 quadrants covered, a relatively good signal to noise ratio, we have I&Q products, a relatively acceptable ADC and later a microprocessor.
Let's assume we want the detector to run at 7kHz (the Deus works best for me that way).
It will be an easy task for the microprocessor to generate a 7kHz clock for the TX and 28kHz for the mux.
Additionally, we can save processor resources (if it is a weak one) if we generate only 28kHz and get 7kHz with an external divider.
What do we have left? Very simple manipulation with I&Q in the processor code.
The result of everything; very simple, small and with a minimum of components metal detector that will have solid performance.
At such low frequencies we don't need an ultra-fast mux, which is good news for me.
etc