Digital correction algorithms to improve battery voltage measurement accuracy

US11536773B2 · kind B2 · utility

Assignee

• TEXAS INSTRUMENTS INCORPORATED · US

Inventors

• Jose Antonio Vieira Formenti · Dallas, US
• Michael Szelong · Sunnyvale, US
• Takao Oshida · Plano, US
• Tobias Bernhard Fritz · Seukendorf, DE
• Vishnu Ravinuthula · Allen, US

Key dates

• Filing date: Jul 30, 2021
• Grant date: Dec 27, 2022
• Expiry date: Jul 30, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M1/38
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

An electronic device includes an ADC, a multiplexer, a voltage reference circuit, an analog circuit, and a digital circuit. The ADC has a signal input, a reference input, and an output. The multiplexer has signal inputs and a signal output coupled to the signal input of the ADC. The voltage reference circuit has an output coupled to the reference input of the ADC, a first strain sensor coupled to a first signal input of the multiplexer, a second strain sensor coupled to a second signal input of the multiplexer, and a temperature sensor. The analog circuit has an input coupled to a battery, and an output coupled to a fourth signal input of the multiplexer. The digital circuit is coupled to the output of the ADC and stores correction parameters for correcting a converted battery voltage value from the ADC.