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:
Sep. 03, 2002
Filed:
Jun. 22, 2000
Brian T. Donovan, Wilsonville, OR (US);
Ray S. McKaig, Wilsonville, OR (US);
William B. Dress, Wilsonville, OR (US);
Xyron Corporation, Vancouver, WA (US);
Abstract
An analog to digital convertor includes a pulse width modulated circuit (PWM) responsive to an analog parameter of an analog signal. The PWM circuit generates a pulse having a duty cycle proportional to the analog parameter. A counter generates a plurality of counterpulses during the pulse duty cycle and a sub-cycle pulse generator generates a series of subcycle pulses during each of the counterpulses. A latch circuit latches the state of the subcycle pulse generator at a predetermined time relative to the termination of the PWM pulse and a logic circuit counts the number of counterpulses which are generated during the PWM pulse. A most significant bit number is represented by the number of counter-pulses and a least significant bit number is determined by the state of the subcycle pulses in the latch. These two numbers added together provide a digital number representative of the analog parameter.