13 Threads found on edaboard.com: Level Trigger And Edge Trigger
I would like to know how schmitt trigger input level thresholds are defined and how they are supposed to be measured? This seems like obvious thing but here is a problem:
When schmitt trigger is meassured with slow saw wave (for example 1kHz) the input levels (...)
ASIC Design Methodologies and Tools (Digital) :: 10-31-2016 13:14 :: Gornarok :: Replies: 1 :: Views: 270
I wonder how you drive a LED from the comparator output and keeping a sufficient high level at the same time? Without a schematic that shows all component values it's hard to know.
Analog Circuit Design :: 09-23-2012 13:28 :: FvM :: Replies: 7 :: Views: 951
the FF is triggered by edge (falling or rising) and a latch is trigger by level
Elementary Electronic Questions :: 08-29-2012 14:47 :: gabrielg :: Replies: 3 :: Views: 945
Tektronics have long been for >50yrs masters of the trigger design. They use a wide variety of input signal conditioning for HPF, LPF and once used a PLL for retriggerable stable windowed time base control. They also have video trigger so the negative sync (...)
Elementary Electronic Questions :: 06-16-2012 15:55 :: SunnySkyguy :: Replies: 6 :: Views: 987
As long as the ege of your signal are less than 10mS apart, the easiest way would be to use the "Interrupt On Change" interrupt to detect an edge, and set a timer to trigger 10mS later. When the timer interrupt fires, set an output bit according the the input level at capture time.
Microcontrollers :: 04-28-2010 17:15 :: GSM Man :: Replies: 3 :: Views: 722
On power-on all I/O pins are set as inputs and pulled-up by internal (weak) circuit ..
ExtInt0 and ExtInt1 can be set to trigger an interrupt on the falling edge or low level, that mans that you can safely pull them down to the GND level and by doing so (...)
Microcontrollers :: 03-27-2010 05:53 :: IanP :: Replies: 2 :: Views: 1072
It is because latch is level sensitive.
Meaning, as long as latch enable is active, any signal at input port will be captured at the output port.
Unlike Flip flop, it is an edge sensitive or edge trigger.
The output port will capture the input signal at edge (...)
ASIC Design Methodologies and Tools (Digital) :: 02-25-2008 01:54 :: no_mad :: Replies: 2 :: Views: 1786
Jep is correct, you can not have another signal edge trigger event after clock_edge_trigger. It will always gives error. and it is also NOT NECESSARY!
Use only level trigger.
eg. if (...)
PLD, SPLD, GAL, CPLD, FPGA Design :: 12-09-2007 19:27 :: mpatel :: Replies: 2 :: Views: 2826
manasiw2 u cant do that, if u tie the clock to the select pin using a single MUX then if become latch no DFF cause the output will change as long as the input is changing if the clk is still high.
It become level trigger not edge trigger.
I think kanagavel_docs have provide a good (...)
ASIC Design Methodologies and Tools (Digital) :: 11-06-2007 05:57 :: laststep :: Replies: 7 :: Views: 4157
Only one. Otherwise, it's a buffer.
When level is high, latch gets whatever value coming in. When level is low, it won't latch new value (it stays at old value)
ASIC Design Methodologies and Tools (Digital) :: 03-17-2006 17:59 :: stevepre :: Replies: 10 :: Views: 1019
I want to add;
level trigger interrupt cannot recognize very short time pin signal .
on the other hand edge trigger can recognize any short duration pulse .
ASIC Design Methodologies and Tools (Digital) :: 11-15-2005 20:32 :: Davood Amerion :: Replies: 6 :: Views: 12675
When I use positive level trigger D-latch, What's the propagation time for D-latch?
I.e. from positive edge or from negative edge?
Any suggestions will be appreciated!
ASIC Design Methodologies and Tools (Digital) :: 10-28-2005 03:41 :: davyzhu :: Replies: 3 :: Views: 1530
There are few points to be note here....
1. Make sure that the interrupt is not masked. and note its priority!
2. Whats the nature of interrupt I mean level sensitive OR edge trigger or both??
3. You are using switch that mans you may need debouncing!!
PLD, SPLD, GAL, CPLD, FPGA Design :: 09-06-2005 04:27 :: nand_gates :: Replies: 1 :: Views: 1281