Phase error determination using two modulators
AssigneeInfineon Technologies AG
InventorsVincenzo Fiore, Werner Arriola, Oliver Lang, Alexander Melzer
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Abstract
Noise test systems, methods, and circuitries are provided for determining a phase error of a first modulator using a second modulator. In one example, an integrated circuit device includes a first modulator configured to modulate a first signal to generate a first modulated signal and a second modulator configured to modulate a second signal to generate a second modulated signal. The first signal and the second signal are based on the same reference signal. The integrated circuit device also includes analysis circuitry configured to determine a phase error of the first modulator based on the first modulated signal and the second modulated signal.
Claims20
An integrated circuit device comprising:
- a first modulator configured to modulate a first signal to generate a first modulated signal;
- a second modulator configured to modulate a second signal to generate a second modulated signal;
- wherein the first signal and the second signal are based on a common reference signal;
- and
- analysis circuitry configured to determine a phase error of the first modulator based on a phase of a combination of the first modulated signal and the second modulated signal.
A method for determining a phase error of a first modulator, comprising:
- providing a common reference signal to the first modulator to generate a first modulated signal;
- providing the common reference signal to a second modulator to generate a second modulated signal;
- and
- determining the phase error of the first modulator based on a phase of a combination of the first modulated signal and the second modulated signal.
Analysis circuitry, comprising:
- measurement circuitry configured to generate a phase error by combining a first modulated signal with a second modulated signal, wherein the first modulated signal is a result of modulation of a common reference signal by a first modulator and the second modulated signal is a result of modulation of the common reference signal by a second modulator;
- and
- computation circuitry configured to determine a phase error of the first modulator based on the phase error of the combination of the first modulated signal and the second modulated signal.
Dependencies are inferred from the claim text.