Temperature detector circuit and method thereof

Details Temperature detector circuit and method thereof Temperature detector circuit and method thereof

2005-01-25

2005-01-25

Nguyen, Minh (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Specific identifiable device, circuit, or system

Negative resistance type

C327S538000, C323S315000

Reexamination Certificate

active

06847254

ABSTRACT:
To generate a signal when a target temperature is reached, a temperature detector circuit is provided with a first and second current sources connected in series, of which the first current source generates a PTAT current and the second current source is supplied with a temperature-independent reference voltage to generate a second current proportional to the reference voltage. The first and second currents are a first and second reference currents, respectively, at a reference temperature, and the first and second current sources are configured such that the ratio of the second reference current to the first reference current is proportional to the ratio of the target temperature to the reference temperature.

REFERENCES:
patent: 4313082 (1982-01-01), Neidorff
patent: 5563760 (1996-10-01), Lowis et al.
patent: 5980106 (1999-11-01), Yamamoto et al.
patent: 6222470 (2001-04-01), Schuelke
patent: 6459326 (2002-10-01), Descombes
patent: 6563295 (2003-05-01), Juang

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