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US 6,310,569 B1Granted
Skewless differential switching scheme for current-mode digital-to-analog converters
AssigneeTexas Instruments Incorporated
InventorsIrfan A. Chaudhry, Abdellatif Bellaouar, Mounir Fares, Eric G. Soenen
Life of this patent
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Abstract
A skewless differential switching circuit uses skewless switching elements to convert complementary signals with skew into complementary output signals with minimal time skew between the output signals and with equalized rise and fall times of the output signals for minimum harmonic distortion.
Claims8
A differential switching circuit comprising:
- a first inverter;
- a first high-side transistor coupled between the first inverter and a high-side power supply node;
- a first low-side transistor coupled between the first inverter and a low-side power supply node;
- an output node of the first inverter coupled to a control node of the first high-side transistor and a control node of the first low-side transistor;
- a second inverter;
- a second high-side transistor coupled between the second inverter and the high-side power supply node;
- a second low-side transistor coupled between the second inverter and the low-side power supply node;
- an output node of the second inverter coupled to a control node of the second high-side transistor and a control node of the second low-side transistor, wherein the first and second inverters are coupled together between the inverters and the high-side transistors, and between the inverters and the low-side transistors;
- and
- a first transfer switch coupled to an input of the first inverter;
- and
- a second transfer switch coupled to an input of the second inverter.
9 more elements
Dependencies are inferred from the claim text.