ELECTRIC BRIDGE FOR MEASURING N-PORT NETWORK PARAMETERS Russian patent published in 1999 - IPC

FIELD: physical quantities measurement technology. SUBSTANCE: bridge has series- connected pulse train generator 1 with voltage varying within pulse length obeying K_ot^°,K₁t′,K_n-1t^n-1 law, where K₀,K₁ are constants; t is time; electric bridge; and null-indicator 29. Generator has pulse shapers 2, 3, 4, ... with voltage varying to obey power function law, switch 6, and power amplifier 6. In-step operation of pulse shapers and null-indicator is ensured by synchronizing unit 7 provided in generator. Bridge circuit including equipment under measurement has ratio-arm resistor 22 and two terminals for connecting equipment under measurement; common lead of resistor and one of terminals forms first lead of bridge output. Bridge circuit including equalizing (adjustable) resistors has ratio-arm resistor 8 connected in series with circuit set up of parallel-connected resistor 9 and network of series-connected capacitor 10 and two resistors 11, 12. Novelty is introduction of branch incorporating equalizing resistors of bridge of n-3 similar increment circuits, where n is number of components in equivalent circuit of equipment under measurement. Each increment circuit has series-connected capacitor (say, 19), first and second resistors (say, 20, 21). Capacitor (say, 19) of each next increment circuit is connected to common lead of capacitor (say, 16) and first resistor (say, 17) of preceding circuit, and its second resistor (say, 21), to common lead of two resistors (say, 17, 18) of preceding increment circuit. Common lead of two resistors (say, 20, 21) of last increment circuit forms second lead of bridge output. EFFECT: enlarged functional capabilities. 1 dwg