Power-on reset circuit for monolithic I.C.'s

Details Power-on reset circuit for monolithic I.C.'s Power-on reset circuit for monolithic I.C.'s

1978-11-01

1981-03-03

Heyman, John S.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307237, H03L 100

Patent

active

042543479

ABSTRACT:
A circuit for providing a control signal having a first predetermined magnitude in response to an analog voltage having a magnitude below a particular threshold and the control signal having a second predetermined magnitude in response to the magnitude of the analog voltage being above the particular threshold includes a threshold establishing circuit, a first transistor and a second transistor. The threshold establishing circuit receives the analog voltage and enables the first transistor to remain non-conductive until the analog voltage reaches the threshold. The second transistor is connected to the first transistor and to the analog voltage supply. The second transistor is arranged to be initially conductive as the magnitude of the analog voltage rises, and to become non-conductive in response to the first transistor being rendered conductive so that the desired control signal is developed at an output electrode of the second transistor.

REFERENCES:
patent: 3253210 (1966-05-01), Cummins
patent: 3317818 (1967-05-01), Beyer
patent: 3523198 (1970-08-01), Keller
patent: 3754182 (1973-08-01), Morris et al.

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