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21 Threads found on Response Time Comparator
I presume your hysteresis plot is recorded as static transfer characteristic. The transient test signals may be simply too short to trigger. The comparator behavior can be characterized by a response time versus overdrive curve. Fast response needs some overdrive beyond the 790 mV point.
As a first step, review your UC2843 model. Using a comparator with several 10 ?s of response time in it looks like a joke.
Each stage (SAR, DAC, comparator, S/H) has its own timing and these need to be sequenced for best sampling rate and accuracy tradeoff. A small state machine with either higher speed clocking, or self-timed, is likely what you want. The analog elements' settling time, response time will set the timing (...)
Hi There, I am really confused between two parameters in the comparator. The Propagation delay and the response time. I understand that the Propagation delay is the delay from input to output of a digital gate switch and the response time is how quickly a comparator changes output (...)
I simply do not share your optimism about response time and whether that's fast enough to save the converter. So I still recommend you dig until you find a threat model for load dumb that some of these "authorities" have seen fit to bless. They want compliance, to something. Bet on that, and find it. Then you can set about proof. What I see in a c
It depends upon the load you want to drive and how fast you want a response. You should keep the output sink current to no more than 8mA so the smallest resistor you can use is R = Vs / 8mA where Vs is the voltage to the resistor. The largest value depends upon the load and the response time you need to drive the output load stray (...)
The LTC1841 commparator has a propagation delay of up to 14us LTC1841 DATASHEET How can this be? ...i thought comparators were supposed to be fast? The LM393 has a response time of 1.4us LM393 DATASHEET: ....The 14us seems ridiculo
HI, i m serching an opamp with good parameter. i want to differentiate 2 signals for that i am searching differetial amplifier. In which instead of slew rate and bandwidh, response time is given. how it differs ? if differential amplifier has 80ns response time than what it's indicate?
What makes you think that you can get away with 0 delay? The datasheet says Typ. response time TRES 200ns
i asked the tutor he said its the delay of the 555timer and flip-flop. that caused the phase shift between flip-flop output and comparator output. Doesn't sound reasonable. 4027 and 555 have delays in < 1us range, even the comparator response time is much faster than the delays viewn in your waveform. The (...)
Does response time of a comparator in the datasheet means the time it takes the output to see the change of the input? and the slew rate is the time for the output to change its state? if i am correct about the response time, is there a way to improve it? thank you
LM393 is a comparator so Gain-bandwidth is irrelevant. Large signal response time is 300ns, small signal 1.3us so for 50kHz you will be fine. Keith.
Any idea where I can know what's the response time of the analog comparator inside the AT89C2051? It does not seem to be mentioned in the datasheet anywhere!
Hi, I am calculating the steepest slope for the output time response of the the two-stage open-loop comparator. From the book (Allen, P.448, Eq.8.2-13), it says I need to find it by differentiating the equation of time response twice and setting the result the result = 0. Why??? I know the slope can be (...)
Well first if you want to design 40 Msps-12 Bits SAR ADC, you need 480 MHz takt. That means your comparator, and your DAC need to have 2.1ns response time totally. That is quite a problem. Second you need to design "12 bit good" comparator (regarding offset) and 12 bit good DAC (regarding matching) which is also very big (...)
Hi all, Table 8.2-2 of Allen?s book <> gives us a procedure to design a two-stage open-loop comparator for a linear response, in step 3, there is a equation I5=I7(2CI/CII), but I really don?t know how and from where can I derive it, your suggestions and time will be highly appreciated. Rgds, Terry
All I know is that comparators are used to compare signals and they are very important therefore are used in many types of circuits. So how are comparators used in these circuits? What makes a good comparator in different application? Is faster response time and larger output voltage always better? (...)
hi ,every one now i have to design a comparator with 5mv offset and 40ns response time.what i want to ask to you is how i can measure the response time and offset with hspice. as far as i know,the comparator's response have two ways that is linear and slew depending on the (...)
This is because normally opamp has compensation capacitor which will slow down response time of the output or the rising/ falling of the output. As comparator, you no need it because it is a open loop system. Correct. The most popular OA, the 741, had a version without the compensation capacitor (if I'm not wrong, it was
For a NMOS open-drain comparator circuit, how to reduce the ?response time High to Low?? Thanks.
Actually, I am using a latched comparator in my switching reg controller now. It has some very good points in its favor like a 30ns response time. But the main disadv I have noticed so far is its resolution/accuracy. It's not its strong point! More info on latched comparator: check following IEEE paper, "Design (...)