METHOD FOR DETERMINATION OF INPUT IMPEDANCES OF ELECTRIC CIRCUIT AND DEVICE FOR ITS REALIZATION Russian patent published in 2007 - IPC G01R27/02 

FIELD: measuring equipment, in particular, methods, for measurement of input impedances of low-frequency and high-frequency electric circuits, and devices for their relation.

SUBSTANCE: the offered device for measurement of input impedances of electric circuit has two input terminals for connection of the circuit impedance to be measured, sine voltage generator, standard resistor whose first end is connected to the first input terminal, he first and second keyed synchronous defectors the first and second double-channel switches and a power source, DC power source, additional resistor, the first and second low-pass filters, alphanumeric indicator, manual control console, interconnected in an appropriate way. The sine voltage generator is made in the form of a cascade-connected microcontroller, frequency setting element, frequency synthesizer, shift register with a feedback, digital-to-analog connecter and in AC voltage amplifier. The given device also realizes the respective method for measurement of input impedances of electric circuits.

EFFECT: expanded band of operating frequencies, in which the measurement of input impedances of electric circuits is performed, enhanced precision of measurement of input impedances of electric circuits.

2 cl, 2 dwg