New answers tagged zener
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Zener + MOSFET overvoltage protection
Below is a circuit to provide an accurate voltage-limit rather than a cut-off, using the inexpensive (>U$1) TL431 adjustable reference:
It's basically a very low dropout (LDO) regulator where the ...
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Zener + MOSFET overvoltage protection
Below is the lTspice sim of a circuit that turns off the output when the supply voltage exceeds 13V.
It uses the inexpensive TL431 programable shunt (Zener type) reference as a comparator, which is ...
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Zener + MOSFET overvoltage protection
Your circuit won't work, because the MOSFET's \$V_{GS}\$ is being clamped to a maximum of 13V by D1, but is never actively reduced to zero, to switch off the transistor.
Also, using a MOSFET to ...
- 42.1k
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LTSpice simulation of Zener Diode Breakdown
To model a zener, using the bv property only is not enough.
You also need to define the reverse breakdown characteristics: Nbv, <...
- 38.1k
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LTSpice simulation of Zener Diode Breakdown
Simulators can model the current-voltage curve of a Zener diode. Using the Circuit Lab simulator built it into this site simulated a 1N4728A Zener which has a nominal Zener voltage of 3.3 V:
simulate ...
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How does this amplifier stage work?
Q1 is functioning as an emitter follower, but most of the current is supplied by Q2. R3 along with R5 and RV1 form a voltage divider that sets the overall gain. You can think of it as a very simple ...
- 176k
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Accepted
Auto switch power source for RPi Pico type board
The datasheet for the Pico has section "4.5. Powering Pico" which describes powering the board from two sources. https://datasheets.raspberrypi.com/pico/pico-datasheet.pdf
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Accepted
Determing the line and load regulation of a Zener MOSFET regulator
How can I use this small-signal model to find the load regulation?
Load regulation is the expected (and hopefully maximum) change in output voltage corresponding to a specified change in output ...
- 80.3k
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Determing the line and load regulation of a Zener MOSFET regulator
Small-signal analysis explicitly ignores the significant changes in operating point of the transistor. When operating in the source-follower configuration, \$V_{GS}\$ has strong dependencies on both \$...
- 176k
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Determing the line and load regulation of a Zener MOSFET regulator
This answer is using AI and i feel it is correct
Line Regulation
The expression you derived for ( v_o ) in terms of ( v_i ) is indeed a small-signal representation. To determine line regulation, you ...
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