Programmable voltage-output floating-gate digital to analog converter and tunable resistors
US7280063B2 · kind B2 · utility
10Cited by
10References
14Claims
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Key dates
| Filing date | May 1, 2006 |
| Grant date | Oct 9, 2007 |
| Priority date | — |
| Expiry date | May 1, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1061
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A digital to analog converter (DAC) includes an operational amplifier and a plurality of ladder elements. Each ladder element includes an epot for providing a voltage, a capacitor, and a switch for selecting between a first voltage and a reference voltage, and for providing the first selected voltage to the first capacitor. The output of the ladder elements are coupled to the inverting input of the operational amplifier. Alternatively, the ladder elements may use tunable floating-gate resistors.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.