Calibration scheme for filling lookup table in an ADC

US11881867B2 · kind B2 · utility

Assignee

• TEXAS INSTRUMENTS INCORPORATED · US

Inventors

• Narasimhan Rajagopal · Bengaluru, IN
• Eeshan Miglani · Parasia, IN
• Chirag Chandrahas Shetty · Thane, IN
• Neeraj Shrivastava · Bengaluru, IN
• Shagun Dusad · Bengaluru, IN
• Srinivas Kumar Reddy Naru · Markapur, IN
• Nithin Gopinath · Kanchinakote, IN
• Charls Babu · Bengaluru, IN
• Shivam Srivastava · Kanchinakote, IN
• Viswanathan Nagarajan · Bengaluru, IN
• Jagannathan Venkataraman · Bengaluru, IN
• Harshit Moondra · Mumbai, IN
• Prasanth K · Ottapalam, IN
• Visvesvaraya Pentakota · Bengaluru, IN

Key dates

• Filing date: Sep 7, 2021
• Grant date: Jan 23, 2024
• Expiry date: Sep 7, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M1/365
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

In described examples, a circuit includes a calibration engine. The calibration engine generates multiple input codes. A digital to analog converter (DAC) is coupled to the calibration engine, and generates a first calibration signal in response to a first input code of the multiple input codes. An analog to digital converter (ADC) is coupled to the DAC, and generates multiple raw codes responsive to the first calibration signal. A storage circuit is coupled to the ADC and stores a first output code corresponding to the first input code. The first output code is obtained using the multiple raw codes generated by the ADC.