String DAC leakage current cancellation

US8912939B2 · kind B2 · utility

Assignee

• ANALOG DEVICES TECHNOLOGY · BM

Inventor

• Dennis A. Dempsey · Crecora, IE

Key dates

• Filing date: Mar 15, 2013
• Grant date: Dec 16, 2014
• Expiry date: Mar 15, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H03M1/765
• WIPO field: Basic communication processes
• WIPO sector: Electrical engineering

Abstract

Embodiments of the present invention may provide a multi-string DAC with leakage current cancellation. A leakage cancellation circuit may be coupled to output node(s) of the—multi-string DAC. The leakage cancellation circuit may replicate leakage current present at the coupled output node(s) and generate a corresponding complementary signal, a leakage cancellation signal. The leakage cancellation signal may be injected into the coupled output node(s) to cancel (or reduce) the net impact of the leakage current.