direct-coupled amplifier
81Microphone — For the indie film, see Microphone (film). Microphones redirects here. For the indie band, see The Microphones. A …
82Klipsch Audio Technologies — Infobox Company company name = Klipsch Audio Technologies company company type = Manufacturing foundation = 1946 as Klipsch and Associates location = Indianapolis, Indiana key people = Paul W. Klipsch, Founder Fred and Judy Klipsch, Owners Paul… …
83Video camera tube — In older video cameras, before the mid to late 1980s, a video camera tube or pickup tube was used instead of a charge coupled device (CCD) for converting an optical image into an electrical signal. Several types were in use from the 1930s to the… …
84Submarine communications cable — A cross section of a submarine communications cable. 1 Polyethylene 2 Mylar tape 3 Stranded steel wires 4 Aluminium water barrier 5 Polycarbonate 6 Copper or aluminium tube 7 Petroleum jelly 8 Optical fib …
85Optical hybrid — A 90° optical hybrid is a six port device that is used for coherent signal demodulation for either homodyne or heterodyne detection. It would mix the incoming signal with the four quadratural states associated with the reference signal in the… …
86Technology of television — The technology of television has changed since its early days using a mechanical system invented by Paul Gottlieb Nipkow in 1884.Elements of a television system , 1957 1. power switch / volume 2. brightness 3. pitch 4. vertical synchro 5.… …
87Q-switching — Q switching, sometimes known as giant pulse formation, is a technique by which a laser can be made to produce a pulsed output beam. The technique allows the production of light pulses with extremely high (gigawatt) peak power, much higher than… …
88Laser safety — A typical laser warning symbol. Laser safety is safe design, use and implementation of lasers to minimize the risk of laser accidents, especially those involving eye injuries. Since even relatively small amounts of laser light can lead to… …
89Static inverter plant — A static inverter station, also known as an HVDC Converter Station, is the terminal equipment for a high voltage direct current transmission line, in which direct current is converted to three phase alternating current, and, usually, the reverse …
90Double bass — Contrabass redirects here. For other uses, see Contrabass (disambiguation). Not to be confused with Acoustic bass guitar. For the technique used in percussion, see Double bass drum. Double Bass Side and front views of a modern double bass with a… …
