Astable Multivibrator - Solid-state Devices and Analog Circuits - Day 6, Part 5

The astable multivibrator is one of the simplest oscillators. It is simply two common-emitter amplifiers where the output of the second is fed to the input of the first. Because of its high gain, it saturates and produces square waves.
Here is the link to my detailed video on the astable multivibrator:
• Astable Multivibrator ...
Vocademy - Free Vocational Education

[@patricklanra3507]

Vous êtes le meilleur. Merci pour toutes vos vidéos et votre talent dans la transmission de votre savoir.

[@m2a687]

Perfectamente explicado sin la matemática confusa de Millman y Taub.

[@xDR1TeK]

I'm an engineer and I object! I'm not lazy 🤣. I love watching circuit videos, especially when veterans are at the helm. Thank you for the simplified presentation there, so when are we going to expect the heavy lifting? 💪

[@ThusithaWijesiri-vn4mq]

Thank you ....!!!

[@alexsd9400]

Большое спасибо! Thank you so much!

[@Disillusioned_one]

When capacitor plate to the base is clamped at 0.7v and the other plate is at 10v when the transistor turns on and the 10v goes to 0v the other plate at 0.7 follows in a 10v change which means the 0.7v drops to -9v sharply turning off the other transistor. The capacitor will discharge back up from -9v to +0.7 turning it back on. Look at the bases of both transistors on a oscilloscope and it can be clearly seen.

[@Vocademy-Electronics-Tech]

I explain that in detail in the other video, but I wanted to use a simpler explanation in this video.

[@ecananth477]

thank you sir

[@TheEngineeringExperienceYT]

Your lectures are great!

[@MrDoneboy]

Thanks, Bob!

[@cnccontroller]

Interesting as always, thank you very much!

[@steve50431]

Hey just wanted to say thanks for posting !

[@dalrob9969]

Nice.

[@pavlobilous4030]

Nice explanation! I am trying to create a circuit for d type flip flop and I think I only need to add an inverter to the circuit you described (assuming removing capacitors). Thanks!

[@johng.3740]

Your explanation of how the astable mutivibrator works via positive feedback leading to extreme saturation to the point that the output looks like a square wave....is much much much easier to understand than the on off capacitor explanation.

[@Vocademy-Electronics-Tech]

Thanks. I never thought of the positive feedback explanation until I started to apply basic oscillator theory without first considering working oscillators. I think one explanation is as good as the other, but the more angles you look from the better you understand.

[@johng.3740]

@@Vocademy-Electronics-Tech Good points.

[@david_pilling]

One of the first circuits I built using my Philips electronics kit (a long time ago). It is still not easy for me to grasp how it works. One transistor is on, one is off and one of the capacitors charges up to change the situation. Your presentation in these lectures is excellent.

[@Disillusioned_one]

I had a Philips electronic kit as well, built all the circuits in the kit. Favourite was ldr turning a lamp on when dark, put in kitchen when my mother switched the light off it came on causing my mum to switch the kitchen light on where my circuit light went off. She did see the funny side and amazed at 11 years old I could build it. 1967

[@david_pilling]

@@Disillusioned_one- same age and year as when I got the Philips electronics kit. Happy days.

[@sajjad213]

Hi sir. Thank you for your explanation.
I have a question. How can we apply barkhausen criteria to this oscillator?
Thank you

[@user-mz6ur9re5j]

👍👍👍🌹🌹🌹