Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Patent
1981-02-05
1982-11-30
Shoop, William M.
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
307297, 307304, 330288, G05F 320
Patent
active
043617972
ABSTRACT:
A constant current circuit comprising first and second insulated gate field effect transistors connected in series, and third and fourth insulated gate field effect transistors connected in series. The series connected transistor pairs are connected in parallel. The first and third transistors have different threshold voltages, and have their respective gate electrodes connected together, and the second and fourth transistors have equal threshold voltages and have their respective gate electrodes connected together. The gate of the second transistor is connected to the node between the first and second transistors, and the gate of the third transistor is connected to the node between the third and fourth transistors. A fifth insulated gate field effect transistor has a gate electrode connected to a respective one of the nodes so as to flow therethrough a substantially constant current when a supply voltage is applied across the pair of parallel connected series transistor pairs and the fifth transistor is connected in parallel with the supply voltage.
REFERENCES:
patent: 3832644 (1974-08-01), Nagata et al.
patent: 3875430 (1975-04-01), Prak
patent: 3887881 (1975-06-01), Hoffmann
patent: 4011471 (1977-03-01), Rockett, Jr.
patent: 4264874 (1981-04-01), Young
Kamiya Masaaki
Kojima Yoshikazu
Adams Bruce L.
Burns Robert E.
Kabushiki Kaisha Daini Seikosha
Lobato Emmanuel J.
Shoop William M.
LandOfFree
Constant current circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Constant current circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Constant current circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-197402