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46 Threads found on edaboard.com: Overlapping Clock
didn't work on a breadboard at 2Hz, 3, 16, 32, 64, etc., up to 16.7kHz, and changing passive components to fit frequencies, until I connected the NOR gates as inverters See how this compares to an led chaser I experimented with in hardware recently. It has output pulses overlapping, like your diagram. Counter to normal
Hi, Implementing a non overlapping clock generator (NOCG) is fairly straightforward. But my problem is that the generated non-overlapped clocks are not symmetric (On time of the two non-overlapped clocks is slightly different). I read somewhere that adding an asymmetric transmission gate will help having symmetric (...)
Questions of data rate or read/write address sequence are in fact involved, but apparently the OP has no problems in this regard, so why should we read them into this question? Dual port RAM can be also used to transfer data between asynchronous clock domains, as long as overlapping accesses to the same memory cell are avoided by suitable means.
You see the ways to make like a Johnson Counter sequence . Synchronous counter decoder, rotating serial shift register. Unknown Setup/hold times can produce unpredictable results. But, if you wanted the edges to be non-overlapping as well as each state, then there must be a dead-band between output phases, such as used in full bridge drive
Hi Does any materials regarding non overlapping clocks design?
hello everyone, i'm having trouble with this the output of my 3 stage cmos rectifier is 0.4 with input vrf = 0.25V, then if i connect the rectifier to a non-overlapping and self-oscillating clock and a voltage doubler circuit the output of my rectifier becomes 0.16V and the final output of my voltage doubler is 0.5V..but if i change the rectifier
Can anybody give me a circuit that converts DC(direct current) voltage to square wave with an input voltage as low as 200mV?...Tnx
Depends if you need non-overlapping clocks or not. If not, you could simply use the same clock signal for both transistors (like in a normal inverter). If the two transistors are connected in series, however - like in a normal inverter - you'll get current shot through during switching, what might not be important for a small inverter, but w
Hello sir. I am reading about lockup latches. Sir how exactly lockup cell removes the hold violation? And sir why we do check setup analysis in next clock and not at the same clock? If first clock for destination clock laging the source clock and during that time if data can settle then what will be happen? (...)
Hi, I am trying to unfix all the placed instances in my design and planning to do a refine placement to resolve violations due to overlapping. Please let me know the command that I should use to unfix all my instances. ( there is an option for unplacing instances "unPlaceAllInsts" linkwise do we have anything for unfixing??) Th
Draw the circuit diagram of a one-bit Dynamic Shift Register, based on CMOS inverters and transmission gates, using a 2-phase, non-overlapping clock. Briefly explain the operation of the circuit Modify your design such that it has a parallel input and can store data when the clock is stopped. Briefly explain its operation For a (...)
Hello All, Im not so experienced with non-overlapping clock generators so have 2 probably quite basic questions on them: Going by the topology of two cross-coupled NOR gates with even numbers of inverters inserted in their feedback paths: - Are the inverters inserted to increase the non-overlapping durations? - Could you not just (...)
Dear all, Is it possible to synthesize & verify a RTL latch-based design using DC? Or for latch-based designs, there're methodologies rather than DC? I know there's a way to create two non-overlapping clocks using create_clock, but not sure if DC/PT can verify the timing after PR, that the skew between the two (...)
You can see this material:Simulating Switched-Capacitor Filters with SpectreRF~I designed one 4th order switched capacitor biquad filter in UMC 180 nm technology using cadence software (version 5.10.41).This circuit is operating on a two phase non overlapping clock generator (i/p frequency = 1 kHz). To simulate this circui
Yes, that's exactly the circuit I mean. Non-overlapping clock would be preferred, but isn't necessarily required for digital circuits. Standard CMOS logic devices and usual ASIC libraries don't have it. As long as the input doesn't change during clock edge, there's no advantage of break-before-make action.
I think the second one can work too. I am trying to make a two-phase non overlapping clock generator for my SC integrator. can u plz tell me why people use such a professional clock generator as this (im
Hi XC, Non overlapping refers to H level. Note that td has a minimum of 0 ns. So, logic H's can not overlap. Regards Z
Hi, I want to make the layout of a non-overlapping clock generator. In that circuit i am using two delay elements each of which is a cascade of even number of slow inverters having small aspect ratios(20 inverters in series). Can i use common centroid or some another layout techniques while making layout of the delay elements? thanks in a
Hi fellas, I am designing a high speed track and hold in Switched-Source-Follower topology. But I don't know whether the clock signals should be non-overlapping or not. I have read a lot about the Switched-Capacitor type, and understand their clock signals should be non-overlapping. But what about SSF? I don't remember (...)
I have 3 clocks in my design. The third pulse clock is generated based on first clock.What is the best to represent this third pulse clock. CLK1 and CLK2(duty cycle of 48%) are non overlapping phase clocks CLK3 is a pulse clock that is double the frequency of CLK1 but (...)