Electricity: measuring and testing – Plural – automatically sequential tests
Patent
1980-04-25
1982-11-02
Strecker, Gerard R.
Electricity: measuring and testing
Plural, automatically sequential tests
324426, G01R 1512, G01R 3136
Patent
active
043575749
ABSTRACT:
Loading apparatus for testing a power supply comprises an electronic load circuit, the electronic load circuit comprising an organically and systematically connected mode switching circuit capable switching from and to one another a constant resistance mode, a constant current mode and a slave mode. A load switching circuit is connected to the mode switching circuit and an error amplifier is adapted to input a voltage signal in each of the modes. A field effect transistor circuit is adapted to receive the output of the error amplifier as a gate control signal and has a drain terminal to which is fed the output from a power unit under test and further has a source terminal, the output of which is fed back as a comparison voltage signal to the error amplifier. A current measurement display circuit is branched to the source terminal of the field effect transistor circuit, and an overpower protection warning circuit is also branched to the source terminal. A voltage measurement display circuit is connected to the drain terminal, and a switching time setting circuit is provided for setting an automatic switching time in the load switching circuit.
REFERENCES:
patent: 3500167 (1970-03-01), Applegate et al.
patent: 3593099 (1971-07-01), Scholl
patent: 3594642 (1971-07-01), Wright
patent: 3848181 (1974-11-01), Hebert et al.
patent: 3969667 (1976-07-01), McWilliams
patent: 4021718 (1977-05-01), Konrad
patent: 4163194 (1979-07-01), Ross
Takamisawa Kaihei
Yui Masatoshi
Strecker Gerard R.
Takamisawa Cybernetics Co. Ltd.
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