. The Bell System technical journal . (e) (f) 2 RATIO ARM TYPE e = GaB ^BC =±9° D (9). (h) (I) 3 PRODUCT ARM TYPE e = eAD +eBc = o° D(j) (K) 4 PRODUCT ARM TYPE e = eAD + eBc = ±9o° Fig. 2—The various forms of 4-arm bridges divided into four types. Formsf, g and j are impractical. that the only term which appears in the balance equation is the term of these bridges represents a distinctly new type, but since theclassification is by means of the fixed impedance arms, one of themmay be used to measure several types of impedance. Accordingly, itmay correspond to more than one of the well-kn
. The Bell System technical journal . (e) (f) 2 RATIO ARM TYPE e = GaB ^BC =±9° D (9). (h) (I) 3 PRODUCT ARM TYPE e = eAD +eBc = o° D(j) (K) 4 PRODUCT ARM TYPE e = eAD + eBc = ±9o° Fig. 2—The various forms of 4-arm bridges divided into four types. Formsf, g and j are impractical. that the only term which appears in the balance equation is the term of these bridges represents a distinctly new type, but since theclassification is by means of the fixed impedance arms, one of themmay be used to measure several types of impedance. Accordingly, itmay correspond to more than one of the well-known bridge types. BRIDGE METHODS OF MEASURING IMPEDANCES 461 For this reason, any references to, or comparison with existing specialtypes of bridge are omitted. TABLE IIBalance Equations Unknown Ratio Arm Type Product Arm Type 8=0 e = + 90» 8 = - 90° 0=0 9 = + 90° 8 = -90 Rcd = LcD =CcD =GcD =LcD =CcD = Figures. . KRadKLadKCadKGadKLadKCad 2A252C KLad MKRad\/KLad Gad/K 2D2F^ K/CadKRad Cad/KK/Gad 2E2G2 KGab KCab KLab Rab/K Cab/K Lab/K 2H21 K/LabKGab Lab/KK/Rab 2J2 KCab \/
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Keywords: ., bookcentury1900, bookdecade1920, booksubjecttechnology, bookyear1
