Switched-capacitor watthour meter circuit having reduced capacit

Details Switched-capacitor watthour meter circuit having reduced capacit Switched-capacitor watthour meter circuit having reduced capacit

1988-06-24

1989-01-24

Smith, Jerry

Electricity: measuring and testing

Measuring, testing, or sensing electricity, per se

Plural inputs

364841, 364844, G01R 21127, G01R 21133

Patent

active

048003336

ABSTRACT:
An electronic energy consumption measuring circuit capable of being fabricated on a single integrated circuit chip employs a switched-capacitor integrator for integrating the product of first and second voltages which are proportional, respectively, to load voltage and current in an electrical system to provide a measure of the energy being consumed, and a hysteresis comparator for converting the integrator output into a pulse train wherein each pulse represents a predetermined amount of energy. The output pulses may be accumulated and displayed to provide an indication of total energy consumed. A divider at the hysteresis comparator output enables the capacitor ratio in the switched-capacitor integrator to be reduced substantially so that the capacitor values are approximately the same order of magnitude. This reduces the chip area necessary for fabricating the capacitors and improves the matching between the capacitors, thereby affording higher integration accuracy.

REFERENCES:
patent: 3875508 (1975-04-01), Milkovic
patent: 3955138 (1976-05-01), Milkovic
patent: 4066960 (1978-01-01), Milkovic
patent: 4217546 (1980-08-01), Milkovic
patent: 4393351 (1983-07-01), Gregorian et al.
patent: 4463311 (1984-07-01), Kobayashi
patent: 4485343 (1984-11-01), Milkovic
patent: 4495463 (1985-01-01), Milkovic
patent: 4535287 (1985-08-01), Milkovic
patent: 4615009 (1986-09-01), Battocletti et al.
patent: 4682102 (1987-07-01), Milkovic

Affiliated with

Also associated with

Rating

Switched-capacitor watthour meter circuit having reduced capacit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switched-capacitor watthour meter circuit having reduced capacit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switched-capacitor watthour meter circuit having reduced capacit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-420898