Patent Number: 6,674,387

Title: Pulse width modulation analog to digital conversion

Abstract: A method and apparatus for analog-to-digital conversion is provided that uses pulse width modulation to provide accurate and reliable conversion of analog signals. The methods and apparatus can be implemented in an analog-to-digital converter (ADC) that can meet the requirements of the most demanding environments. Additionally, the ADC can be implemented to provide the high precision needed for many applications. The method and apparatus provides an ADC that converts a received analog input into a pulse width modulated signal with a duty cycle that is responsive to the analog input. The pulse width modulated signal is passed to a duty cycle mechanism that determines the duty cycle of the pulse width modulated signal. The determined duty cycle can then be used to generate a digital value that is proportional to the analog input. The preferred method and apparatus thus provide a reliable and accurate ADC that can be used in a wide range of environments.

Inventors: Ott; William E. (Phoenix, AZ)

Assignee: Honeywell International Inc.

International Classification: H03M 1/50 (20060101); H03M 001/12 ()

Expiration Date: 01/06/2021