RF transmitter
AssigneeStichting IMEC Nederland
InventorJohan van den Heuvel
Life of this patent
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Abstract
A radio frequency, RF, transmitter, comprises a digitally controlled oscillator, DCO, configured to generate an RF signal; and digital modulation circuitry connected to the DCO for modulation of the RF signal, and driven by an RF clock signal derived from the RF signal, wherein the digital modulation circuitry comprises a module configured to apply a compensation for modulation jitter due to the modulation circuitry being driven by the RF clock signal and a compensation for DCO non-linearity.
Claims23
A radio frequency, RF, transmitter, comprising:
- a digitally controlled oscillator, DCO, configured to generate an RF signal;
- and
- digital modulation circuitry connected to the DCO for modulation of the RF signal, and driven by an RF clock signal derived from the RF signal,
- wherein the digital modulation circuitry is configured to apply a compensation for modulation jitter due to the digital modulation circuitry being driven by the RF clock signal and a compensation for DCO non-linearity, and
- wherein the compensation for modulation jitter and the compensation for DCO non-linearity are applied to a capacitor control of the DCO.
A method of generating a digitally-modulated radio frequency, RF, signal, using an RF transmitter comprising:
- a digitally controlled oscillator, DCO;
- and
- digital modulation circuitry connected to the DCO,
- the method comprising:
- generating, at the DCO, an RF signal;
- driving the digital modulation circuitry by an RF clock signal derived from the RF signal;
- inputting, at the digital modulation circuitry, symbols for modulation;
- applying, at the digital modulation circuitry, a compensation for modulation jitter due to the digital modulation circuitry being driven by the RF clock signal and a compensation for DCO non-linearity;
- and
- modulating the RF signal as controlled by the digital modulation circuitry,
- wherein the compensation for modulation jitter and the compensation for DCO non-linearity are applied to a capacitor control of the DCO.
Dependencies are inferred from the claim text.