Circuit configuration for sensing when a critical temperature of

Details Circuit configuration for sensing when a critical temperature of Circuit configuration for sensing when a critical temperature of

1998-06-26

2000-11-07

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

External effect

Temperature

327378, 361103, 323907, H03K 1714, G01K 714

Patent

active

061442461

ABSTRACT:
The circuit configuration for sensing when a critical temperature of a component has been exceeded makes use of at least one sense transistor which has a temperature-dependent current/voltage characteristic and which is thermally connected to the component. A current source is connected in series with the sense transistor. A circuit device for compensating for parasitic leakage currents at the sense transistor is provided. The circuit device has a measurement transistor and two current mirror circuits. By compensating for leakage currents, the proper operation of the temperature sensor is guaranteed over the entire temperature range and the destruction of the component is prevented.

REFERENCES:
patent: 4216394 (1980-08-01), Leidich
patent: 4363979 (1982-12-01), Honig et al.
patent: 4503381 (1985-03-01), Bowers
patent: 4613772 (1986-09-01), Young
patent: 4652144 (1987-03-01), Gunther et al.
Japanese Patent Abstract No. 01155714 (Fumihiko), dated Jun. 19, 1989.

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