Using a tracking switched-mode power supply to increase efficiency of a current digital-to-analog converter-based output stage
AssigneeCirrus Logic, Inc.
InventorsJohn L. Melanson, Johann G. Gaboriau, Lei Zhu, Wai-Shun Shum, Xiaofan Fei, Leyi Yin
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Abstract
A system may include a current digital-to-analog converter (IDAC) configured to convert a digital input signal into an output current signal and a switched-mode power supply configured to provide electrical energy in the form of a supply voltage to the IDAC for operation of the IDAC, the switched-mode power supply configured to track a voltage signal derived from the digital input current signal and generate the supply voltage based on the voltage signal and a voltage headroom above the voltage signal.
Claims30
A system comprising:
- a current digital-to-analog converter (IDAC) configured to convert a digital input signal into an output current signal;
- and
- a switched-mode power supply configured to provide electrical energy in the form of a supply voltage to the IDAC for operation of the IDAC, the switched-mode power supply configured to:
- track a voltage signal derived from the digital input current signal;
- and
- generate the supply voltage based on the voltage signal and a voltage headroom above the voltage signal.
A method comprising, in a system comprising a current digital-to-analog converter (IDAC) configured to convert a digital input signal into an output current signal and a switched-mode power supply configured to provide electrical energy in the form of a supply voltage to the IDAC for operation of the IDAC:
- tracking a voltage signal derived from the digital input current signal;
- and
- generating the supply voltage based on the voltage signal and a voltage headroom above the voltage signal.
Dependencies are inferred from the claim text.