Title: On-line detection method for function of operational amplifier
Application Number: 98100595 Application Date: 1998.03.03
Publication Number: 1193114 Publication Date: 1998.09.16
Approval Pub. Date: Granted Pub. Date: 2003.01.22
International Classifi-cation: G01R31/26
Applicant(s) Name: Han Rong Address: 100080
Inventor(s) Name:
Attorney & Agent: zhang weihua
Abstract:
     The invented method includes the following steps: making two input ends of optional amplifier ungrounded or short-circuit with power supply; making inverted input end of operational amplifier short-circuited with output end; inputting test signal less than working voltage of the operational amplifier on circuit board from in-phase input end of the operational amplifier; taking back the test signal from in-phase input end of the operational amplifier and taking back response signal from its output end; and according to the identical extent of the response signal with the outputted excursion of the operational amplifier, deducing open-loop gain of the operational amplifier. The operational amplifier is connected on-line in the form of follower, so that it simplifies test difficulty, and possesses the advantages of simple test operation and quick-obtaining result, etc..
Time: 101
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