Continuous switched-capacitor dual slope watthour meter circuit with charge injection offset compensation
CA 1283453 C · Owner: Milkovic, Miran · Inventors: Milkovic, Miran
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure, Transient offset error voltages due to charge injection by MOS analog switches in switched-capacitor integrators of electronic metering circuits are compensated by use of a continuous switched input capacitor network on the inverting input of the integrator amplifier. Any residual charge injection not cancelled by the switched capacitor network is compensated by employing another switched capacitor network on the non-inverting input of the amplifier and by matching the geometries of the switches in the two networks so that the charge injected into each input of the amplifier is the same.
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted April 23, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 23, 2008.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.