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US 2002/0057100 A1Published application
Threshold invariant voltage detecting device
AssigneeFujitsu Limited
InventorsTomohiro Kawakubo, Hiroyoshi Tomita
Life of this patent
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Abstract
A voltage detecting circuit includes a constant-voltage source, a load part including a first transistor coupled to the constant-voltage source, and a detecting part which is connected to the load part and includes a second transistor of the same type as that of the first transistor. The detecting part detects a given voltage applied thereto.
Claims17
A voltage detecting circuit comprising:
- a constant-voltage source;
- a load part including a first transistor coupled to the constant-voltage source;
- and
- a detecting part which is connected to the load part and includes a second transistor of the same type as that of the first transistor,
- the detecting part detecting a given voltage applied thereto.
2 more elements
A voltage detecting circuit comprising:
- a first transistor having a first terminal coupled to a constant-voltage source, a second terminal connected to a first node, and a control terminal connected to the first terminal;
- and a
- second transistor having a first terminal connected to the first node, a second terminal receiving a given voltage to be detected, and a control terminal grounded,
- the first and second transistors being of an identical type,
- a voltage detection signal being obtained at the first node.
2 more elements
A voltage detecting circuit comprising:
- a first transistor having a first terminal coupled to a constant-voltage source, a second terminal connected to a first node, and a control terminal connected to the first terminal;
- a second transistor having a first terminal connected to the first node, a second terminal, and a control terminal grounded;
- and
- a third transistor having a first terminal connected to the second terminal of the second transistor, a second terminal receiving a given voltage to be detected, and a control terminal grounded,
- the first, second and third transistors being of an identical type,
- a voltage detection signal being obtained at the first node.
3 more elements
A voltage detecting circuit comprising:
- a first transistor having a first terminal coupled to a constant-voltage source, a second terminal connected to a first node, and a control terminal connected to the first terminal;
- a second transistor having a first terminal connected to the first node, a second terminal, and a control terminal grounded;
- and
- a third transistor having a first terminal connected to the second terminal of the second transistor, a second terminal receiving a given voltage to be detected, and a control terminal connected to the first terminal of the third transistor,
- the first, second and third transistors being of an identical type,
- a voltage detection signal being obtained at the first node.
3 more elements
Dependencies are inferred from the claim text.