Recent content by eliotsbowe

Thanks for your time guys. Finally I decided to go and personally ask my professor what kind of picture he expects his students to have in mind :D

Well, thanks for the tip, I'll check that book out. I kind of figured out that the subject is really hard to qualitatively depict.

Hello, I'm studying basic nonlinear optics and I would like to solve a couple doubts about (basic) photon interaction. Let a monocromatic (of frequency ω) electromagnetic field propagate through a nonlinear medium and let the third(and higher)-order terms in the relation between the...

got it, thanks!

Hello, may someone help me to understand this? I know that in vectored interrupts, a device asks the CPU to run a certain ISR by sending a specific code. Now, in polled interrupts there's no interrupt vector. So how does the CPU know what's the Interrupt Service Routine to be run? Perhaps...

I found it. The Sedra-Smith's book says that the interaction between 2r0 and Cgdm creates a low frequency zero. Every other internal capacitance is to be considered as an open circuit, then.

Hello, I have a doubt about the high frequency response of the MOSFET (or BJT as well) differential couple in the case it's polarized by a current mirror. Here's a picture of my issue (it shows the semi-differential circuit of a MOSFET differential couple with a "small" common mode ac input...

I think the answers made my ideas clear, many thanks to everybody :smile:

Hello, I'm studying the MOS/BJT differential pair on Microelectronics by Sedra-Smith. The book refers to voltage signals with the following notations: = DC voltage = AC voltage = generic time-varying voltage When it comes to differential pairs, it uses a quite confusing notation for...

Ok, thanks!

Okay, I think I got it. Just one thing: to compute the input impedance of a circuit, I usually disconnect the signal generator and its own resistance and replace it with a test generator, let's say a voltage generator Vx. The input impedance is defined as Vx / Ix , where Ix is the current...

Well, thanks for trying, but I'm interested in the procedure to find the two impedances!

Thanks. I managed to solve the first two questions and I found something I was looking for in the pdf you've linked. Now there's one pending question: what's the input/output impedance of the differential couple? I mean: if I connect some circuit component to the two inputs of the...

Hello, I'm having some issues with small-signal analysis of BJT differential amplifiers. Let's say I have this BJT differential pair and suppose that Q1 and Q2 perfectly match: http://i50.tinypic.com/14ahdgn.jpg Suppose a small differential input is applied and consider the small–signal...

That was helpful, thanks a lot!