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I have no idea what it is but I did find this:
http://www.harrykrantz.com/catalog.php?pid=RN4004 if that's any help at all.
http://www.harrykrantz.com/catalog.php?pid=RN4004 if that's any help at all.
Thanks pwdixon,That really helped.
I was wondering If there is a way to find a replacement/newer version of this IC. Can anyone shed light on this?
Without a datasheet that's a real problem. Though if you had a schematic it might be possible to work out what the part does and work out a replacement that way.
Just seeing the symbol, I think we could guess some things:
1. The symbol resembles a Symmetrical JFET (in contrast to an Asymmetrical one). Probably the polarity between Source and Drain doesn't matter. The arrows might just be a way to highlight this feature.
2. The component has the Source marked out. It probably shows the pole where the control voltage of the Gate is referenced.
3. The full line between Drain and Source could indicate a Depletion type FET, which means it would lead current when Vgs=0V
4. The Gate line shows a type of MOSFET with isolated Gate: very high input impedance and Voltage Controlling.
1. The symbol resembles a Symmetrical JFET (in contrast to an Asymmetrical one). Probably the polarity between Source and Drain doesn't matter. The arrows might just be a way to highlight this feature.
2. The component has the Source marked out. It probably shows the pole where the control voltage of the Gate is referenced.
3. The full line between Drain and Source could indicate a Depletion type FET, which means it would lead current when Vgs=0V
4. The Gate line shows a type of MOSFET with isolated Gate: very high input impedance and Voltage Controlling.
Thanks for the input Electrobrains & pwdixon, please take a look at the circuit where it belongs.
I'm attaching the circuit diagram with the component ..
the first is the main part with RN4004. the second one is where the inputs(or outputs?) [A & B] are connected, the third is a diagram of the functioning of the main circuit. Apparently its called a Synchronous detector.
I'm attaching the circuit diagram with the component ..
the first is the main part with RN4004. the second one is where the inputs(or outputs?) [A & B] are connected, the third is a diagram of the functioning of the main circuit. Apparently its called a Synchronous detector.
Hi
Yes, I too think that the circuit symbol represents something that could be replaced by a bilateral switch.
But how fast does it have to switch? Maybe the IGFETs outperform the 4066, so what is the frequency of the signal being synchronously detected?
Yes, I too think that the circuit symbol represents something that could be replaced by a bilateral switch.
But how fast does it have to switch? Maybe the IGFETs outperform the 4066, so what is the frequency of the signal being synchronously detected?
I worked on something similar to this in the 80's that was a system that extracted a very low signal from a very noisy input.
The signal was modulated with the signal input level extracted using a phase sensitive
detector with the reference signal switching two mosfets.
In my case the mosfets were switching the signal to ground, in the case of your circuit the mosfets switch the signal directly.
This means that your device have to be capable of switching a bidirectional signal and probably must not have a drain source diode included, that reduces your choice of parts quite significantly as a great many potential candidates for replacement will include one of these diodes.
The signal was modulated with the signal input level extracted using a phase sensitive
detector with the reference signal switching two mosfets.
In my case the mosfets were switching the signal to ground, in the case of your circuit the mosfets switch the signal directly.
This means that your device have to be capable of switching a bidirectional signal and probably must not have a drain source diode included, that reduces your choice of parts quite significantly as a great many potential candidates for replacement will include one of these diodes.
I went through what a Synchronous detector is and understand the following:
From diag. 3, Its evident that the weird transistors act as analog switches, able to conduct +/- halves of sine waves with negligible zero crossing error which then add up to give different signals based on phase diff.
The use is to ultimately extract signal proportional to phase difference between two low amplitude signals(less than noise amplitude a times) and subsequently amplify it to a DC value with an LP filter.
The inputs are input 1&2 which will be low amplitude AC. the switch is operated by voltages <24 V(possibly <20V) (diag. 2) from the other two transistors.
This link gave me those surmises:
http://measure.feld.cvut.cz/system/files/files/cs/vyuka/predmety/A3M38MSZ/SynchrDetectBW.pdf
Please advise on whether my understanding is right and suggest alternative transistors that might do the same job.
4066 might be a good choice but i am worried about the maximum Gate voltage that can be applied.
From diag. 3, Its evident that the weird transistors act as analog switches, able to conduct +/- halves of sine waves with negligible zero crossing error which then add up to give different signals based on phase diff.
The use is to ultimately extract signal proportional to phase difference between two low amplitude signals(less than noise amplitude a times) and subsequently amplify it to a DC value with an LP filter.
The inputs are input 1&2 which will be low amplitude AC. the switch is operated by voltages <24 V(possibly <20V) (diag. 2) from the other two transistors.
This link gave me those surmises:
http://measure.feld.cvut.cz/system/files/files/cs/vyuka/predmety/A3M38MSZ/SynchrDetectBW.pdf
Please advise on whether my understanding is right and suggest alternative transistors that might do the same job.
4066 might be a good choice but i am worried about the maximum Gate voltage that can be applied.
Perhaps a switching mosfet with a series diode might do the trick.
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