TTL technology and the 7400 family have been largely obsolete since the 1990s, replaced by complementary metal oxide silicon and other low-power, high-density and high-speed IC technologies. However, the fundamental logic gates -- such as AND, OR,NANDandNORgates -- embodied in TTL ICs remain...
Large voltages must be stepped down to the nominal digitizing level. There are sensors for this, including potential transducers (PTs) which can divide the thousands of volts on an electrical transmission line down to a safe level. The output of a PT is then fed into the voltage signal condi...
1 What is a TTL signal? Discrete inputs are normally output from a relay or transducer at TTL (transistor to transistor logic) levels, which are based on a 5V pull-up. In theory, the perfect TTL on/off signal would be 0V representing OFF (meaning a digital value of 0), and 5V ...
Depending on the type of logic gate being used and the combination of inputs, the binary output will differ. A logic gate can be thought of like a light switch, where in one position the output is off (0), and in another, it is on (1). Logic gates are commonly used inintegrated ...
using ttl could lead to data loss. custom expiration logic if the expiration logic is complex and cannot be adequately handled by a ttl mechanism, it might be better to implement custom expiration logic within the application layer. in these cases, it’s better to manually manage data expiratio...
The domain name server (sometimes referred to as the second-level domain name server) holds the zone file with the IP address for the full domain name, such as “ibm.com.” How does DNS work? Every query (sometimes called a DNS request) in the DNS follows the same logic to resolve IP...
Chained proxies, the program itself can be used as an proxies, and if it is set up, it can be used as a secondary proxies or even an N-level proxies. Communication encryption, if the program is not a level one proxies, and the upper level proxies is also the program, then the commu...
For example, the UpGuard.com zone public key is signed by its parent, the com zone. Each zone parent is responsible for vouching for the authenticity of its child zone's public key. You can follow this logic all the way up the DNS tree to the DNS root zone, which is responsible for...
CompactRIO with NI-DAQmx brings two software experiences into one by combining the ease of use of NI-DAQmx and the low-level functionality of LabVIEW FPGA.
Transistor-transistor logic (TTL) is a class of integrated circuits which maintain logic states and achieve switching with the help of bipolar transistors. One of the prominent features of transistor-transistor logic signals is the ability of the inputs of the gate rise to the logical “1” if...