Power supply voltage step-down circuitry

Details Power supply voltage step-down circuitry Power supply voltage step-down circuitry

1999-11-09

2000-08-29

Nguyen, Matthew

Electricity: power supply or regulation systems

Output level responsive

Using a three or more terminal semiconductive device as the...

G05F 1445

Patent

active

061113956

ABSTRACT:
Power supply voltage step-down circuitry comprises a control unit for enabling either a first voltage step-down unit or a second voltage step-down unit according to a control signal applied thereto, a voltage checking unit for checking whether or not the value of a voltage generated by a power supply is equal to or greater than a predetermined value, and for furnishing a checking result signal at a predetermined level when the value of the voltage generated by the power supply is equal to or greater than a predetermined value, and a switching unit for connecting either the power supply or an output of the first step-down unit with a receiver, such as a ROM, according to whether or not the checking result signal from the voltage checking unit is at the predetermined level. The voltage checking unit includes a Schmidt circuit that furnishes the checking result signal at a level corresponding to the value of an output of a checking unit for furnishing the output having a value corresponding to the power supply voltage.

REFERENCES:
patent: 5373477 (1994-12-01), Sugibayashi
patent: 5408172 (1995-04-01), Tamimoto et al.
patent: 5506495 (1996-04-01), Uchida
patent: 5696465 (1997-12-01), Ishzuka

Affiliated with

Also associated with

Rating

Power supply voltage step-down circuitry does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Power supply voltage step-down circuitry, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power supply voltage step-down circuitry will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1253412