Phase locked loop, phase locked loop arrangement, transmitter and receiver and method for providing an oscillator signal

A transmitter arrangement, comprising:

• at least two phase locked loops, wherein each of the phase locked loops comprises:
• a loop filter configured to provide a control signal to a controllable oscillator, the controllable oscillator configured to provide an oscillator signal in response to the control signal;
• a frequency divider configured to provide a first feedback signal and a second feedback signal in response to the oscillator signal, the second feedback signal delayed with respect to the first feedback signal;
• an interpolator configured to:
• receive the first feedback signal, the second feedback signal, and a phase control word;
• and
• provide an interpolated signal thereof between the first and second feedback signal and in response to the phase control word;
• and
• wherein the interpolator comprises a dummy circuitry arranged such as to provide a substantially constant impedance load to at least one of the inputs of the interpolator irrespectively of the phase control word;
• a comparator path configured to receive the interpolated signal and to provide a respective signal to the loop filter in response to a phase deviation between a common reference signal and the interpolated signal;
• a reference signal source providing a reference signal and coupled to the comparator path of each of the at least two phase locked loops;
• a phase deviation circuit configured to provide the phase control word to each of the phase locked loops to generate a phase difference between oscillator signals of the at least two phase locked loops;
• and
• an antenna array having a plurality of antenna elements, wherein each of the antenna elements is in operative connection to a respective one of the phase locked loops of the phase locked loop arrangement to receive an individual signal for transmission derived from a respective oscillator signal thereof.

A receiver arrangement, comprising:

• at least two phase locked loops, wherein each of the phase locked loops comprises:
• a loop filter configured to provide a control signal to a controllable oscillator, the controllable oscillator configured to provide an oscillator signal in response to the control signal;
• a frequency divider configured to provide a first feedback signal and a second feedback signal in response to the oscillator signal, the second feedback signal delayed with respect to the first feedback signal;
• an interpolator configured to:
• receive the first feedback signal, the second feedback signal, and a phase control word;
• and
• provide an interpolated signal thereof between the first and second feedback signal and in response to the phase control word;
• and
• wherein the interpolator comprises a dummy circuitry arranged such as to provide a substantially constant impedance load to at least one of the inputs of the interpolator irrespectively of the phase control word;
• a comparator path configured to receive the interpolated signal and to provide a respective signal to the loop filter in response to a phase deviation between a common reference signal and the interpolated signal;
• a reference signal source providing a reference signal and coupled to the comparator path of each of the at least two phase locked loops;
• a phase deviation circuit configured to provide the phase control word to each of the phase locked loops to generate a phase difference between oscillator signals of the at least two phase locked loops;
• and
• an antenna array having a plurality of antenna elements, wherein each of the antenna elements is in operative connection to a respective one of the phase locked loops of the phase locked loop arrangement to down-convert a received signal with the respective oscillator signal thereof.