00:51 Developing a circuit model for the bipolar transistor 04:29 Transconductance measures the strength of a bipolar device in translating a voltage change to a current change 10:19 Transistor can act as a current source and its values can change. 13:47 Finding IC as a function of time 19:59 Dependent current source placement in simplest bipolar transistor model 22:21 Modeling the base current using a diode 28:04 Transistor model replacement and circuit simplification 31:10 Analyzing large-signal and small-signal operation of Razavi Electronics 37:26 Nonlinear functions require mathematical labor in bipolar transistor circuits. 40:27 Analysis of voltage and current in the circuit with a sinusoidal microphone signal 47:45 Large signal operation allows for signals of any amplitude, leading to complex exponential expressions for IC. 50:57 Small-signal operation assumes input signal is small compared to the bias voltage. 57:35 Small signal operation leads to sinusoidal behavior of collector current. 1:00:42 GM times input voltage equals current fluctuation

the best part is the practical application and the entire signal chaining . I just pose the video try thinking of what should be the next block like we had today laptop charger.

Seems there is a logical fallacy around the 32-33th minute which is this: the saturation condition of the non-degenerate MOS is V_DS > = V_GS - V_th => V_DS > = VG - V_th (assuming the source S is grounded, so V_GS = VG - 0 = VG). However, with degeneration, the condition is still the same except that the source S is no more grounded, and therefore, the condition becomes V_DS > = V_GS - V_th = VG - VS - V_th = VG - ID*Rs - V_th ... so, the left (lower) limit of the saturation region from the value of VG - V_th then shifts to the value of VG - ID*Rs - V_th <= VG - V_th i.e. to a lower value (or, in other words, the saturation region seems broader against the triode region). Why is the saturation region then sacrificed upon degeneration (assuming the same VG to ground in both cases)?

this varactor diode concept damn...its great

Superrb lecture sir❤

26:48 If there is to be a recombination of electrons , then the 1st case shouldn't be a n type semiconductor then . ?? .

the best lecturer. as my age is lesser than his experience you earned my respect mr razavi one word i want to say to you the best faculty i've ever seen in this generation.

the 🐐

the intro goes very hard

I guess in these calculations we assume that r_o=infinity, ie, no channel length modulation.

why didn't i find these lectures earlier 🥲

Great explanation 💯

sir meine masti masti mei apni chod li

Name of the advanced analog course that sir told in lecture ?

can't we solve the equation in 34:00 with calculator? actually i guess we can and i solved it and found Ic=0,019A where is my mistake?

Thank you for sharing your knowledge with us. Just loved the explanation and felt in love with the subject. (NOW THE CIRCUIT WON'T BITE !!)

Why you talk about cellphone? it's not related to the topic.

Very clear explanation and analysis. Thanks

@15:10 but isnt vout change polarity depending on whether we measure it against vcc or against dc gnd? Does this carry over to small signal model?

Sir during solving for output impedances as we are setting the Vgs as 0 so the device should be off at the time so all the effects of channel length modulation cant be there as it is in triode region so the r0 should always be= infinity isn't that true

very nice

sir also mentioned BRAIN 😁

Your ability to elucidate intricate concepts into readily comprehensible pieces is truly impressive. Thank you for your clear explanation.

I am an electrical engineering student studying basic electronics for the first year course, I hope I find a teacher like you who teaches electrical subjects so effieciently.. Learning from you I regret why did not I choose electronics. Well thank you very much sir from India

thxxxxxxxxxxxxxxxxxxx

nice

Thanks 😊👍🙏💯

Here for 1st year electronics, I love it. Can someone suggest this kind of content for Electrical part?

40:22

😀😃😃😃😃

A LEGEND

@55:03 can we bias the circuit just at the boundary of the triode and saturation regions? I thought our biasing had to be well into the saturation region and away from the triode region..

This course is phenomenal!!! I tried so hard reading textbooks + watching lectures in my university, but they make electronics seem a billion times harder!!! I can't thank you enough Professor Razavi!!!!

nice. i love your lectures.

But when the r_d is replaced by the constant current source, will the device still be in saturation? Also, must the current passing on the constant current source be the same with the current that arise from v_gs?

@35:00 so what is the conclusion? it seems the gain is stuck at 2 and cannot be increased.

behzad abi noolur bu derslere devam et yahu.. seviyoruz seni.. love from turkey..

@24:49 second attempt seems to be wrong as there is no V_DS.

Immense Gratitude

Firstly, at 38:30 you said Electric field us zero due to no net charge. I think that's not true beause if you take the case of a dipole even though the net charge is zero there exists an electric field because there is separation between the charges. The same works here. Here due to no net charge the flux is zero that is the integral is zero. If the inetgral is zero, it doesn't mean that the electric field is zero.

in self based cs stage how Vg equal to Vd when there is a resistor between. and why will no current flow through it

I can't believe a busy UCLA professor spending time and energy making these high quality lectures for random youtube watchers! Prof. Razavi, thank you so much. You're a great professor and an amazing human being!

LEGEND

No anyone can beat this lecture series in future Thanks.

Thanks Razavi Sir ✨

You>>>>>>>>> my prof.

I’m here for the intro. I listen before sleep every night.

1:04:28 why do not the extra electrons from the left side neutralize the +ve ions present in the depletion region and distribute the positive immobile ions uniformly throughout the n region rather than near the junction. Same towards the p type region? Would really love early, thoughtfull and reasonable replies.

dont understand why the circuit at 30:00 isnt v1=vr1+vout? can anyone explain?

00:03 Introduction to RLC Circuits and summary of properties of resistors, capacitors, and inductors 03:52 RLC circuit behavior with initial conditions 08:44 Analysis of RLC circuits with constant currents 11:17 Analysis of current behavior in RLC circuits. 16:20 Summary of RLC Circuits 18:44 Comparison of energy storage in resistors, capacitors, and inductors 23:39 Capacitor can be modeled as a battery with value v0 25:46 Modeling inductor as open circuit during time period 30:23 Understanding behavior of RLC circuit components in steady state 32:44 Introduction to RLC circuits and their importance in understanding real-life circuits. 37:05 Introduction to RLC Circuits: Basic concepts and foundational understanding. 39:16 RLC circuit behavior explained during discharge phase 43:27 Inductor stores energy when voltage across the capacitor collapses to zero. 45:12 Energy transfer process in RLC circuits Crafted by Merlin AI.