Power on reset circuit having hysteresis inverters

Details Power on reset circuit having hysteresis inverters Power on reset circuit having hysteresis inverters

1992-10-26

1993-05-18

Wambach, Margaret R.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307290, 3072965, 3072723, 307491, 307264, 307592, 307594, H03K 329, H03K 301

Patent

active

052124126

ABSTRACT:
A power on reset circuit uses a first inverter with hysteresis operating in response to a first power supply potential to develop a first reset signal when the first power supply potential is greater than a first predetermined threshold. A second inverter with hysteresis also operates in response to the first power supply potential for developing a second reset signal when the first power supply potential is greater than a second predetermined threshold. The first reset signal disables the second inverter until the first power supply potential reaches the first predetermined threshold. A delay circuit delays the second reset signal to ensure the first power supply potential is fully operational before indicating a ready condition.

REFERENCES:
patent: 4888497 (1989-12-01), Dallabora et al.
patent: 4888498 (1989-12-01), Kadakia
IBM Tech. Disc. Bul. vol. 32 No. 7 Dec. 1989 "Precision Power-On Reset Control Circuit" pp. 159-160.

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