VARIABLE RESISTORS

Brand Owner (click to sort) Address Description
HDK HOKURIKU ELECTRIC INDUSTRY CO., LTD. 3158, Shimo-okubo Toyama-shi 939-2292 Japan VARIABLE RESISTORS, HYBRID INTEGRATED CIRCUITS, FIXED RESISTORS, CHIP RESISTORS, HIGH VOLTAGE RESISTORS AND HIGH FREQUENCY RESISTORS;
HUMDINGER CLAROSTAT MFG. CO., INC. 285-7 NORTH SIXTH STREET BROOKLYN NY VARIABLE RESISTORS;
P'GRID Tokyo Cosmos Electric Co., Ltd. 268-1, Sobudai 2-chome, Zama-shi Kanagawa 252-8550 Japan variable resistors, namely, electric resistors; electrical switches; power switches;
TIC TECHNOLOGY INSTRUMENT CORPORATION WALTHAM MA VARIABLE RESISTORS, FIXED RESISTORS, MAGNETIC CLUTCHES, AND PRESSURE TRANSDUCERS;
 

Where the owner name is not linked, that owner no longer owns the brand

    
Technical Examples
  1. An absorptive temperature-variable microwave attenuator is produced using a first plurality of shunt resistors separated by quarter-wave transmission lines connected by a series resistor with a second plurality of shunt resistors separated by quarter-wave transmission lines. At least one or more of the resistors are temperature-variable resistors. The temperature coefficients of the temperature-variable resistors are selected so that the attenuator changes at a controlled rate with changes in temperature while attenuator remains relatively matched to the transmission line. In one embodiment, the resistors are thick-film resistors and a variety of temperature coefficients can be created for each resistor by properly selecting and mixing different inks when forming the thick film resistors. Furthermore, attenuators can be created having either a negative temperature coefficient of attenuation or a positive temperature coefficient of attenuation.