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Application filed by Ustav Pristrojove Techniky CsafiledCriticalUstav Pristrojove Techniky Csa
Priority to CS439089ApriorityCriticalpatent/CS274852B2/en
Publication of CS8904390A1publicationCriticalpatent/CS8904390A1/en
Publication of CS274852B2publicationCriticalpatent/CS274852B2/en
Testing Electric Properties And Detecting Electric Faults
(AREA)
Amplifiers
(AREA)
Abstract
The connection of the first stage of the measuring amplifier is formed by the first and second operational amplifier (4 and 5) with the shared resistor (10) being connected between their inverting inputs, while their outputs are connected with the analogue demultiplexers (6, 7), whose outputs are connected with the first and second group of resistors (11, 12, 13, 14 and 16, 17, 18, 19). The second stage of the measuring amplifier is formed by the third operational amplifier (8) with the first feed-back resistor (20), whose output is connected via the summation resistor (21) with the inverting input of the fourth operational amplifier (9), with the second feed-back resistor (15) and output terminal (22).<IMAGE>