Logic of general dynamics of a circuit

Thread Starter

yef smith

Joined Aug 2, 2020
694
Hello, i have here a circuit shown bellow it has 4 parts.
part 1 consists of a HEX inverter
https://assets.nexperia.com/documents/data-sheet/74ABT04.pdf

Part2 has some buffer driver with component shown bellow.

https://www.ti.com/lit/ds/symlink/ucc5304.pdf?HQS=dis-mous-null-mousermode-dsf-pf-null-wwe&ts=1701024772623&ref_url=https%3A%2F%2Fwww.mouser.de%2F

Part 3 is a mosfet
https://www.onsemi.com/pdf/datasheet/ndt3055l-d.pdf
https://www.onsemi.com/products/discrete-power-modules/mosfets/NDT3055L#technical-documentation
Part 4 : has a diode connected in a loop

Could you please say the general dynamics of this circuit?
how these parts play together?
Thanks.
1701024059464.png
 

dl324

Joined Mar 30, 2015
16,679
Could you please say the general dynamics of this circuit?
That style is a terrible way to draw a schematic. Schematics are supposed to convey circuit intent in a format that can be understood. Pin order symbols almost never accomplish that goal. Case in point, section 1 of the "schematic". Can't make any sense of it without redrawing using inverter symbols.

Before I attempt to make sense of it, what have you clipped off on the left side?
 

dl324

Joined Mar 30, 2015
16,679
Sorry. The schematic is just too awful and I can't force myself to redraw it so someone could make sense of it.

Basically, you've got a gate driver, a MOSFET, and some inverters connected in some unfathomable fashion for some unfathomable purpose. The resistors with 0 and none for values make no sense. The component sequence is bizzare.

What I have deciphered doesn't make sense.

The gate driver has a TTL/CMOS compatible input, but two inverters are in parallel to drive the input pin. The voltage divider was put on the input of the gate driver because it has TTL/CMOS compatibility.

The symbol for the MOSFET makes no sense. Pin 1 is the gate, but the G label is closer to pin 3 than pin 1. Connections are shown to pins 2 and 4, but they're redundant. They're typically connected internally in that package. So you only need to connect one or the other.
 
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dl324

Joined Mar 30, 2015
16,679
why do you think we need HEX inverter for such circuit?
Having difficulty forcing myself to look at it. This is what I decipered:
1701029941902.png
I didn't have the part in the schematic, so I just used some 74xx part that had the same pinout.

The person who "created" that "circuit" clearly doesn't how what s/he is doing. I'd just abandon it and design something from scratch or copy something from someone who knows what they're doing.

My advice is to ignore anything drawn like your example. I doubt that anyone who draws in that style actually knows what they're doing.

Schematics are not intended to be used as wiring diagrams. Wiring diagrams are used for wiring (and are not intended to be used to understand what a circuit does).
 
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Thread Starter

yef smith

Joined Aug 2, 2020
694
Hello Dennis , its supposed to output threw the mosfet of section 4 an RF signal as a pulse.
mosfwet is a switch which needs a pulse itself on the gate to output the pulse rf_signal.
1.How does the pulse for the mosfet is being created?
2.how does the RF-signal for the mosfet is being created?

Thanks.
 
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