Integratable solid state reset circuit operable over a wide temp

Details Integratable solid state reset circuit operable over a wide temp Integratable solid state reset circuit operable over a wide temp

1994-06-20

1996-03-12

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

327142, 327399, 327546, H03K 1722

Patent

active

054989876

ABSTRACT:
A reset circuit asserts, de-asserts and re-asserts a reset signal in response to a voltage applied between first and second nodes to which the reset circuit is connected. The reset signal includes a plurality of transistor switches connected together with positive feedback to achieve latching of the reset signal in either a high or a low state. The different inherent conductivity characteristics of the transistor switches causes the switches to begin closing when the applied voltage is at a first predetermined level and causes the transistor switches to begin opening when the applied voltage achieves a second predetermined lower level. The conductivity characteristics of the transistor switches cause the first and second predetermined levels to slightly vary over temperatures in the range of approximately -50.degree. C. to 150.degree. C., allowing reliable operation over a wide range of temperatures. The reset circuit may be integrated with the circuit which it resets.

REFERENCES:
patent: 4196362 (1980-04-01), Machashi
patent: 4725747 (1988-02-01), Stein et al.
patent: 4970408 (1990-11-01), Hanke et al.
patent: 5136181 (1992-08-01), Yukawa

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