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Type: Posts; User: treehugger

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1. ## Thread: Noise contribution in LNA?

by treehugger
Replies
4
Views
1,767

### Closed: post lna contribution to system noise

of course it is correct
2. ## Thread: [20 pts] [urgent ] Boolean equation simplification

by treehugger
Replies
8
Views
1,505

c+ab
3. ## Thread: how to match 2.7 mH+100ohm reactance to 8 ohms?

by treehugger
Replies
5
Views
1,207

### Closed: Re: how to match 2.7 mH+100ohm reactance to 8 ohms?

0.5 ohms of resistance is included to model the wire resistance of the 7 windings.
4. ## Thread: how to match 2.7 mH+100ohm reactance to 8 ohms?

by treehugger
Replies
5
Views
1,207

### Closed: Re: how to match 2.7 mH+100ohm reactance to 8 ohms?

yes there is!

using the 2.7mH as an autotransformer in boosting fashion, and a 1.4nF capacitor.

i asked this question to see if anybody is aware of this trick, and my head is still not very...
5. ## Thread: how to match 2.7 mH+100ohm reactance to 8 ohms?

by treehugger
Replies
5
Views
1,207

### Closed: Re: how to match 2.7 mH+100ohm reactance to 8 ohms?

what is the wisest way of matching 2.7mH+100ohm reactance to 8ohms?
at 80kHZ?

thanks.

ofcourse, without using inductors in the milli henries range.
6. ## Thread: Which one is more important? S11 or S22?

by treehugger
Replies
8
Views
2,532

### Closed: Re: Which one is more important? S11 or S22?

depends on the stage of the system you are designing. I wouldnt care too much about s11 if that is my first stage amplifier.

yeah but the first stages are better if...
7. ## Thread: rectangular coil E field

by treehugger
Replies
0
Views
1,417

### Closed: rectangular coil E field

how would i calculate the E field induced in the plane parallel to the rectangular coil within which timevarying current flows?

8. ## Thread: neuronal gating equation (multiplication) in spice?

by treehugger
Replies
0
Views
1,108

### Closed: neuronal gating equation (multiplication) in spice?

hi.

i want to model the following equation in spice:

dm/dt + (alfa(v)+beta(v))*m = alfa(v)

where alfa and beta are dependent variables on 'v'.
but evidently this requires multiplication.
...
9. ## Thread: design at high frequencies?

by treehugger
Replies
0
Views
898

### Closed: design at high frequencies?

at high frequencies TLs start to radiate. so, what design considerations should be applied at high frequencies?
10. ## Thread: Why do we use 6 transistors for storing 1 bit in SRAM?

by treehugger
Replies
2
Views
1,509

### Closed: Re: sram design

because sometimes speed matters. you need a relatively high capacitance at the end of the mos transistor to store the bit, and that slows down the read-write operation.

".. Ccell must be...

by treehugger
Replies
15
Views
8,032

among tree adders, kogge-stone is the fastest since it requires fewest number of series logic levels (4 levels for 16bit addition actually); however, that requires a good deal of hardware (in...
12. ## Thread: why does a mos transistor saturate?

by treehugger
Replies
8
Views
2,273

### Closed: Re: why does a mos transistor saturate?

hey, thank you for that!
13. ## Thread: why does a mos transistor saturate?

by treehugger
Replies
8
Views
2,273

### Closed: Re: why does a mos transistor saturate?

what happens to Vp @ Vds>Vgs-Vt ?? doesnt Vp increase as we keep increasing Vds?

if it does increase, how do you explain the constant current.
if it does not incrase, why?

thanks.
14. ## Thread: why does a mos transistor saturate?

by treehugger
Replies
8
Views
2,273

### Closed: Re: why does a mos transistor saturate?

nice!

however.. why the pinch off point has a constant voltage Vp?? What is Vp?
15. ## Thread: why does a mos transistor saturate?

by treehugger
Replies
8
Views
2,273

### Closed: Re: why does a mos transistor saturate?

Ids remains (nearly) the same, even though the drain voltage is increasing with respect to source. Why? What is the underlying physics?

i need a...
16. ## Thread: while loop depending on input argument

by treehugger
Replies
4
Views
1,187

### Closed: Re: while loop depending on input argument

can show me a source stating that while loops are not synthesiable?

indeed, if while loops were not synthesiable my synthesis tool would generate an error message stating that "it is not...
17. ## Thread: while loop depending on input argument

by treehugger
Replies
4
Views
1,187

### Closed: while loop depending on input argument

(cross posting)

now this is a very basic question:

The code seen below goes to infinite loop during synthesis, hence my sythesis tool halts (with an error like, "loop has iterated 64 times so...
18. ## Thread: while loop depending on an input argument

by treehugger
Replies
2
Views
947

### Closed: while loop depending on an input argument

now this is a very basic question:

The code seen below goes to infinite loop during synthesis, hence my sythesis tool halts (with an error like, "loop has iterated 64 times so i am halting blah...

by treehugger
Replies
1
Views
1,342

hi,
sorry guys, this is an ameturish (and a bit long) question. however i need help:

i have to design an array of DACs (operating around 50KHz) which will drive an array of large capacitors.
...
20. ## Thread: is there a limitation to paralleling MOS current sources?

by treehugger
Replies
5
Views
1,385

### Closed: Re: is there a limitation to paralleling MOS current sources

actually i am going to design a DAC. since monotonicity is important for me i decided to include as little resistors as possible (maybe non), and that implies big arrays of...
21. ## Thread: is there a limitation to paralleling MOS current sources?

by treehugger
Replies
5
Views
1,385

### Closed: is there a limitation to paralleling MOS current sources?

hi,
in my design, i figured out that i need a large array of current sources (maybe a thousand of them or more). is there any limitation, drawback of paralleling so many current sources?

thanks...
22. ## Thread: two port device with a linear i-v characteristics

by treehugger
Replies
3
Views
1,001

### Closed: Re: two port device with a linear i-v characteristics

thanks for your reply, but is it possible to get rid of that offset value you have mentioned?

by treehugger
Replies
5
Views
6,350

thanks for answering but i have 2 objections:

1) i am quoting from "electronic analog-to-digital converters" by Seitzer and Pretzl:

"..in view of the progress of MOS technology with its...
24. ## Thread: Architecture for 10 µm width DAC

by treehugger
Replies
0
Views
849

### Closed: Architecture for 10 µm width DAC

hi,
which architecture should be used if we are to build a digital to analog converter (DAC) with a width not more than 10µm. what are the restrictions, pitfalls for such a design? (by the way, the...
25. ## Thread: two port device with a linear i-v characteristics

by treehugger
Replies
3
Views
1,001

### Closed: two port device with a linear i-v characteristics

hi,
is it possible to build a two port circuit with highly linear i-v chararacteristics? actually we call them resistors in everyday life, but i want this circuit to be consisting of only MOS...
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