7. What are tri-state devices and why they are
essential in a bus oriented system
Answer Posted / jobby c johnson
let me explain with a device called tri state buffer. it
has threee terminals. inline, enable line, outline.
its working is when enanble line is active output line
follows input line. but if it is not activated then output
line is free.
now how it helps in bus oriented system. consider two
buffers working on inverted logic . two buffers are
recieving differant inputs and the output of two buffers
are connected to same bus. with the help of enabling and
disabling enable line of two buffers we can selectivly
allow one of the input int the bus
| Is This Answer Correct ? | 1 Yes | 0 No |
Post New Answer View All Answers
I want to apply for the universities in US,but i got the GRE score of (650+300=950)TOEFL 69/120.Is this score sufficient for applying universities please i am married i need to go to US because my husband didn't get H1 yet.please send me suggestion
what is the procedure to callibrate temp controller ,pressure controller,etc. suppose a temp controller showing error 1.5 degree centigrate how can i minimize it.
how can we tune a PID. If it is by zeiger nichols method..please explain briefly with help of an example.
There are many type of control cable like pair,core,tried, What are defination each one
pls give me presant awerness quistion and answer in my emailid.
what is function of sensor, and how is it work , explain with difination
Yokogawa CENTUMVP R6.09 unable to download to Engineering Station with ExaOPC R3.75
The issue is when I try to download the common project section to the Engineering Station (STN) from the HIS in System View, it is unable to connect. The error displayed is:
WARNING: Could not connect to equalize destination. (7001)
Retrying. Number of retries = 0/1
ERROR: LdXopsLoadMain: connect error 10060
ERROR: Processing terminated due to connection error. (7002)
Equalization end with errors. STN0149
---- ERROR = 2 WARNING = 1 ----
Background:
>Updated the ExaOPC software on the STN from 3.60 to 3.75
>STN operating system is Windows Server 2008 R2
>HIS operating system is Windows Server 2016 Stanard
Solutions attempted include:
>Ensuring all IP addresses are correct and all networked devices can be pinged.
>The ability to ping a device using its host name from another device (
I want to know the questions asked in ONGC interview(after being selected in the written exam) for Instrumentation branch.Kindly help.
How to calibrate the flow transmitter
what is the criteria to decide conductor size of a cable ?
the pump holds on run indication into the dcs and filed local control panel remote push button condition operaton wrong like when the push button pushing conditions the pump is off and the push button release condition the pump is on totally opposite condition . And control room inside give the stop command into dcs just 1secon relay engage and again normal condition. How can I slove
how many types of spped sensors n vibration sensors?their basic principle n connection?
where are following valves are applicable to install. can any valve be installed any line. globe valve butterfly valve boll valve gate valve
Please tell me details about Sox,Nox,SWAS analyser????
what is wave length were using ?