Patent Yard Sign in
Expired Canadian patentCanada

Capacitor ratio multiplier

CA 1159912 A · Owner: American Telecommunications Corporation · Inventors: Ashby, Robert M.; Carter, Larry E.

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

Open the CIPO record

Abstract From the Canadian patent

12965:MJR CAPACITOR RATIO MULTIPLIER, ABSTRACT A capacitor ratio multiplier has a switched capacitor for switching between sampling, sharing and delivering charge modes. During the sampling mode, the switched capacitor receives charge from a port in a circuit. During the sharing mode, the switched capacitor is paralleled by a sharing capacitor and is partially discharged thereby. The switched capacitor is connected to a port in the circuit for delivering charge. The sharing capacitor is discharged prior to sharing charge with the switched capacitor.

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 January 3, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 3, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 30, 1981
GrantedJanuary 3, 1984
Term endedJanuary 3, 2001
Patent numberCA 1159912 A
Classification (IPC)H02M3/06 +2 more

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedApril 30, 1981Patent grantedJan 3, 1984Term endedJan 3, 2001

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.