Electricity: measuring and testing – Fault detecting in electric circuits and of electric components – Of individual circuit component or element
Patent
1993-11-26
1995-09-12
Wieder, Kenneth A.
Electricity: measuring and testing
Fault detecting in electric circuits and of electric components
Of individual circuit component or element
324678, 209574, G01R 2726
Patent
active
054500141
ABSTRACT:
An in-circuit test apparatus includes a constant voltage source that supplies constant voltages and a current amplification circuit that outputs a constant current based on the constant voltages. A switch transfers the constant current from the current amplification circuit to an inversion amplifier that inversion-amplifies the constant current transferred by the switch. Additionally, a relay circuit transfers the inversion-amplified signal to a test board having a capacitor inserted into the test board. The capacitor charges with the constant current transferred by the relay circuit for a predetermined time period. A voltage follower amplifies the charging voltages on the capacitor to prevent the charging voltage from being discharged due to an internal resistance of the capacitor. Further, a comparison circuit compares the charging voltage on the capacitor with a reference voltage to sense the capacitance of the capacitor and to sense reverse insertion of the capacitor. A buffer buffers an output signal from the comparison circuit and a microprocessor senses the capacitance and reverse insertion of the capacitor in response to an output signal from the buffer.
REFERENCES:
patent: 4728931 (1988-03-01), Linder et al.
patent: 4748401 (1988-05-01), Aldinger
patent: 4779040 (1988-10-01), Aldinger
patent: 5343157 (1994-08-01), Deschamps
LG Industrial Systems Co. Ltd.
Tobin Christopher M.
Wieder Kenneth A.
LandOfFree
Test apparatus for detecting reverse insertion of a capacitor on does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Test apparatus for detecting reverse insertion of a capacitor on, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Test apparatus for detecting reverse insertion of a capacitor on will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-407799