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Comparator input impedance
1st. Thanks both
2nd. I've found in your posted link PIXEL that comparators have a lower i/p impedance than that of opamps when the latter are used in -ve FB configs.
Well, can this be fixed if a large resistor is placed at the i/p of the comparator, or, it's not...
i have a question here...
isn't a comparator just a bunch of cascaded amplifiers?
I've made a comparator formed of cascaded common src stages, with an input differential stage , with single o/p. and it's working just fine, producing a perfect square wave at the o/p when the differential i/p...
when i connect the o/p of the relaxation oscillator (which has a capacitor at its o/p) to a schmitt trigger (which makes the amplitude control of the o/p triangular wave), the wave decays.
i think i'm having a very bad loading effect.
How can i solve this?
I've tried using a source follower...
I'm currenlty making a relaxation oscillator the produces a triangular wave. It is based on a charge pump technique, i.e. the upper current source charges the o/p capacitor (instead of the filter which is usually placed at the o/p of a CP in PLLs) then, after some time, the lower current source...
Can you please supply me with further details?
I'm simulating it, but it gives a dc value at the output at low freq (few KHz) , i.e. the triangular wave is continuously increasing till it dies, while at relatively high frequencies (100's of KHz till MHz) is with no DC .
Also, another problem...
i'm in real need to know how to design a ring oscillator that produces a square wave and how to tune it over a wide frequency range from few hz to 100's of khz?
Are the any papers that talk about ring oscillators design??
and i also need to know if there's another circuit that can generate a...
Okay, hello there,
I need some tutorials about Mentor's IC Station.
Is there anyway to transfer my schematic-level design to a layout automatically and how do i use mentor's IC station to do this job?
I don't think it is logical that after i finish my ct. design on the schematic level to...
sine shaper
Hi all,
I'm supposed to design a wave shaper to shape a previously generated triangular waveform into a Sine wave.
The design is supposed to be implemented on an INTEGRATED CIRCUIT.
So, does anyone has a good shaper design that fits IC implementation :?:
Mentor tools tutorials
I'm very very new to the so-called mentor tools. I don't know anything about them, but i'm supposed to learn it, make a design using it for an IC.
So, i need some pdf tutors about it, details from you about mentor design package and what these tools are?
Are they for...
gsm cluster
Hello there,
How can i design the size of cells using MATLAB according to traffic levels?
In other words, i have a map of subscribers and i want to design the clusters and cells that will
contain those users and serve them.
How can this be done using MATLAB?
I made some searches...
Still very high harmonic signal
I've increased the gain of the opamp and the expected sine wave appeared, but still superimposed over it, the 2.5 MHz sine.
What shall i do???
My project using the famous and simple 16F84A
I've done a simple but very nice (actually it was not simple in the beginning at all) project using 16F84A µC. It was a frequency meter. It measures the frequency of several i/p waves. If it is square, you can directly i/p it to the µC. If it is...
For v_c, sorry, i forgot to put the square root :-) , i.e.
f = 1÷{2*pi*√(C1*C2*R1*R2)}. [/size]
I'm using LM318, and in its datasheet, what is only mentioned is its small signal BW which is 15 MHz, and nothing is mentioned about G.BW product.
The sine is a clean one.
And i'm using 12/-12...
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