Circuit for the detection of a high threshold of a supply voltag

Details Circuit for the detection of a high threshold of a supply voltag Circuit for the detection of a high threshold of a supply voltag

1994-05-04

1995-08-08

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Specific signal discriminating without subsequent control

By amplitude

327 77, 327143, H03K 5153, H03L 700

Patent

active

054402557

ABSTRACT:
A circuit for the detection of a high threshold supply voltage comprising a voltage divider and an inverter. The voltage divider is formed by a reverse-biased voltage breakdown device, such as a Zener diode, and a resistive element, such as a forward-biased transistor or a resistor. The use of the reverse-biased voltage breakdown device in the divider makes the detection threshold voltage (Vo) of the circuit stable and precise even with variations in threshold voltages due to temperature and manufacturing process variations.

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Desai, et al., "Ueber-und Unterspannungs-Uberwachungsschaltungen", Electronic, No. 22, Nov. 1981, pp. 57-62.
Akiyama, "Detection Circuit of Voltage Drop", Patent Abstracts of Japan, vol. 8, Jun. 2, 1984, No. 125, p. 279.
Jachowski, "Monitor Supplies Down to 0.6V", Electronic Design, vol. 37, No. 20, Sep. 1989, pp. 94-95.

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