The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 08, 2013
Filed:
Jun. 24, 2009
Diego Armaroli, Mortara, IT;
Davide Betta, Barzanò, IT;
Marco Ferrari, Voghera, IT;
Roberto Trabattoni, Oggiona con Santo Stefano, IT;
Diego Armaroli, Mortara, IT;
Davide Betta, Barzanò, IT;
Marco Ferrari, Voghera, IT;
Roberto Trabattoni, Oggiona con Santo Stefano, IT;
STMicroelectronics S.R.L., Agrate Brianza (MB), IT;
Abstract
A stepwise voltage ramp generator includes a tank capacitor, a terminal of which is coupled to a reference potential to be charged with a voltage ramp. A transistor couples the tank capacitor to a supply line. A diode-connected transistor, biased with a bias current is coupled to the transistor to form a current mirror. A by-pass switch is electrically coupled in parallel to the diode-connected transistor, and is controlled by a PWM timing signal, the duty-cycle of which determines a mean slope of the generated voltage ramp.