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US 5,861,830 AGranted
Digital to analog converter and dynamic current mirror structure to simplify on-chip wave shaping
AssigneeAdvanced Micro Devices, Inc.
InventorsYi Cheng, Thomas Jefferson Runaldue
Life of this patent
Estimating the term…
Abstract
A digital to analog converter that includes circuitry that converts sequences of positive and negative digital data samples into electrical currents and current mirror circuitry that generates an analog waveform by combining and amplifying the electrical currents.
Claims8
A digital to analog conversion circuit, comprising:
- circuitry for converting a sequence of positive digital data samples into a first electrical current and for converting a sequence of negative digital data samples into a second electrical current;
- current mirror circuitry that generates an analog waveform by combining and amplifying the first and second electrical currents, wherein said current mirror circuitry includes:
- a current amplifying circuit;
- and
- a common mode adjustment circuit.
2 more elements
A digital to analog conversion circuit comprising:
- a digital-to-analog converter, said digital-to-analog converter coupled to receive a sequence of positive digital data samples and to generate on a first output a first electrical current representative of said sequence of positive digital data samples, said digital-to-analog converter further coupled to receive a sequence of negative digital data samples and to generate on a second output a second electrical current representative of said sequence of negative digital data samples;
- and
- a current mirror circuit coupled to said digital-to-analog converter, said current mirror circuit including a current amplifying circuit and a common mode adjustment circuit, said current mirror circuit to generate on a current mirror circuit output an analog waveform by combining and amplifying the first and second electrical currents.
Dependencies are inferred from the claim text.