VCO center frequency tuning and limiting gain variation

An electronic device, comprising:

• a voltage controlled oscillator of a phase locked loop, for providing at least one VCO output signal;
• a reference frequency block, for providing a reference frequency signal containing a stable reference frequency;
• and
• a calibration control module, responsive to said VCO output signal and to said reference frequency signal, for providing at least one VCO tuning voltage signal to said voltage controlled oscillator using a predetermined criterion, for providing a predetermined number of frequency measurements of the at least one VCO output signal by a counter using said at least one VCO output and said reference frequency signal, and for providing to said voltage controlled oscillator, in response to said predetermined number of frequency measurements, a calibration signal for simultaneously implementing center frequency tuning of a VCO output signal and limiting a gain variation of said voltage controlled oscillator according to the predetermined criterion.

An integrated circuit, comprising:

• a voltage controlled oscillator of a phase locked loop, for providing at least one VCO output signal;
• a reference frequency block, for providing a reference frequency signal containing a stable reference frequency;
• and
• a calibration control module, responsive to said VCO output signal and to said reference frequency signal, for providing a at least one VCO tuning voltage signal to said voltage controlled oscillator using a predetermined criterion, for providing a predetermined number of frequency measurements of the at least one VCO output signal by a counter using said at least one VCO output and said reference frequency signal, and and providing to said voltage controlled oscillator, in response to said predetermined number of frequency measurements, a calibration signal for simultaneously implementing center frequency tuning of a VCO output signal and limiting a gain variation of said voltage controlled oscillator according to the predetermined criterion.

An electronic device, comprising:

• means for frequency control, for providing at least one VCO output signal;
• means for reference, for providing a reference frequency signal containing a stable reference frequency;
• and
• means for calibration, responsive to said VCO output signal and to said reference frequency signal, for providing at least one VCO tuning voltage signal to said means for frequency control using a predetermined criterion, for providing a predetermined number of frequency measurements of the at least one VCO output signal by a counter using said at least one VCO output and said reference frequency signal, and for providing to said means for frequency control, in response to said predetermined number of frequency measurements, a calibration signal for simultaneously implementing center frequency tuning of a VCO output signal and limiting a gain variation of said means for frequency control according to the predetermined criterion.