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2. Current loop - Wikipedia

   en.wikipedia.org/wiki/Current_loop

   In industrial process control, analog 4–20 mA current loops are commonly used for electronic signalling, with the two values of 4 and 20 mA representing 0–100% of the range of measurement or control. These loops are used both for carrying sensor information from field instrumentation and carrying control signals to the process modulating ...

3. Signal Chain Solution for 4-mA to 20-mA HART Enabled Field ...

   www.aol.com/2013/03/26/signal-chain-solution-for...

   Signal Chain Solution for 4-mA to 20-mA HART Enabled Field Instrument Applications NORWOOD, Mass.--(BUSINESS WIRE)-- Analog Devices, Inc. (NAS: ADI) introduced today the CN0267 demonstration ...

4. Digital current loop interface - Wikipedia

   en.wikipedia.org/wiki/Digital_current_loop_interface

   Older teleprinters used a 60 mA current loop. Later machines, such as the Teletype Model 33, operated on a lower 20 mA current level and most early minicomputers featured a 20 mA current loop interface, with an RS-232 port generally available as a more expensive option. The original IBM PC serial port card had provisions for a 20 mA current ...

5. 4-20 mA - Wikipedia

   en.wikipedia.org/?title=4-20_mA&redirect=no

   This page was last edited on 13 March 2007, at 22:35 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may ...

6. Twisted nematic field effect - Wikipedia

   en.wikipedia.org/wiki/Twisted_nematic_field_effect

   The introduction of TN-effect displays led to their rapid expansion in the display field, quickly pushing out other common technologies like monolithic LEDs and CRTs for most electronics. By the 1990s, TN-effect LCDs were largely universal in portable electronics, although since then, many applications of LCDs adopted alternatives to the TN ...

7. Quartz clock - Wikipedia

   en.wikipedia.org/wiki/Quartz_clock

   Citizen analog-digital chronograph with 4 area radio time signal reception (North America, Europe, China, Japan) and radio-controlled synchronization It is possible for a computerized high-accuracy quartz movement to measure its temperature and adjust for that.