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US 2016/0094378 A1Published application
System for generating a calibration signal, related transceiver and method
AssigneeSTMicroelectronics S.r.l.
InventorsRanieri Guerra, Giuseppe Palmisano
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Abstract
A calibration signal is generated from a modulating signal having a first frequency and a carrier signal having a second frequency. A single-sideband mixer modulates the modulating signal on the carrier signal. At least two frequency dividers by two connected in cascade receive the modulating signal modulated on the carrier signal and generate an output of the calibration signal.
Claims12
A system for generating a calibration signal, comprising:
- a first source circuit configured to generate a first modulating signal having a first frequency;
- an oscillator configured to generate a first carrier signal having a second frequency;
- and
- a first circuit comprising:
- a single-sideband mixer configured to modulate said first modulating signal on said first carrier signal;
- and
- at least two frequency dividers by two connected in cascade, wherein said frequency dividers in cascade receive said first modulating signal modulated on said first carrier signal and output said calibration signal.
4 more elements
A transceiver, comprising:
- a system for generating a calibration signal;
- and
- a receiver circuit configured to receive a radio-frequency signal, wherein said receiver circuit is configured for receiving said calibration signal during a calibration step;
- wherein the system for generating comprises:
- a first source circuit configured to generate a first modulating signal having a first frequency;
- an oscillator configured to generate a first carrier signal having a second frequency;
- and
- a first circuit comprising:
- a single-sideband mixer configured to modulate said first modulating signal on said first carrier signal;
- and
- at least two frequency dividers by two connected in cascade, wherein said frequency dividers in cascade receive said first modulating signal modulated on said first carrier signal and output said calibration signal.
8 more elements
A method for generating a calibration signal, comprising the steps of:
- generating a first modulating signal having a first frequency;
- generating a first carrier signal having a second frequency;
- modulating via a single-sideband mixer said first modulating signal on said first carrier signal;
- and
- generating said calibration signal via a frequency division by at least four of said first modulating signal modulated on said first carrier signal.
2 more elements
Dependencies are inferred from the claim text.