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Voltage comparator with NPN transistor

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Circuit Description

Q2 switches on when V1 is less than 3.4V

FALY says:

bonjour
j'espère que vous allez bien avez vous un schéma de circuit modulation et démodulation de fréquence? j'en ai besoin pour on projet de fin d'étude.
Merci d'avance
cordialement
Mail: papambagnefaly.diagne@laposte.net

6 years, 3 months ago

BezerraBrasileiro says:

Yes.

6 years, 2 months ago

BezerraBrasileiro says:

https://books.google.com.br/books/about/Experiments_in_telecommunications.html?id=hStTAAAAMAAJ&redir_esc=y

6 years, 2 months ago

BezerraBrasileiro says:

Learn electronics using multisim and mathcad software.
Subtitles in English.
My youtube channel:
Electronic Engineering with Multisim and Mathcad

https://youtu.be/ss3HJRlmOGk
https://www.youtube.com/channel/UCEAnEPQFMiq5NAzcCdosXsg?view_as=subscriber

5 years, 11 months ago

adi80 says:

Can you please have a look to my schematic. Why is not working?

5 years, 10 months ago

n1sa says:

hi. Can you show how to find bc547c transistor in multisim simulator?

5 years, 4 months ago

BezerraBrasileiro says:

5 years, 2 months ago

user-52 says:

Good that you put the 3.4V threshold in the description. Worth knowing it'll drift with temperature, since it rides on Vbe at roughly 2mV per degree, so it's dependable for switching something on and less dependable if you need 3.4V to stay 3.4V in a warm enclosure.

One more thing since this one still gets traffic: Multisim Live shuts down September 15 and saved circuits go with it. There's an importer for Multisim Live circuits at CircuitSim, https://circuitsim.com, which I work on. Video of it here: https://www.youtube.com/watch?v=-6ZqL7cAsHw

1 week ago

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Electronics Applied

11 Members

Test Multisim Live Group

11 Members

Creator

BezerraBrasileiro

17 Circuits

Date Created

9 years, 6 months ago

Last Modified

5 years, 11 months ago

Circuit Copied From

Voltage comparator with PNP transistor

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Voltage comparator with NPN transistor

Circuit Description

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