Voltage level sensing circuit

Details Voltage level sensing circuit Voltage level sensing circuit

1984-07-06

1986-06-10

Zazworsky, John

Electrical transmission or interconnection systems

Personnel safety or limit control features

Interlock

307296R, 307363, H03K 5153

Patent

active

045945187

ABSTRACT:
A first insulated-gate field-effect transistor (IGFET), responsive to an input voltage, supplies a current to a second IGFET when the input voltage exceeds the threshold voltage of the first IGFET. The second IGFET is connected in combination with a third IGFET, of complementary conductivity type, for sensing when the input voltage exceeds the sum of the threshold voltages of the second and third IGFETs. When that occurs, the third IGFET produces an output which is fed back to the first IGFET interrupting the flow of current between the first and second IGFETs.

REFERENCES:
patent: 4001609 (1977-01-01), Sickert
patent: 4300065 (1981-11-01), Remedi et al.
patent: 4409501 (1983-10-01), Eickerman et al.

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