Dual mode voltage supply circuit

An integrated circuit (IC) comprising:

• a voltage controlled oscillator (VCO);
• a tuner that communicates with the VCO and that is operable to adjust oscillations of the VCO to a determined frequency;
• and
• a dual mode voltage supply circuit that comprises:
• an active mode voltage supply circuit that is selectively operative to supply a voltage to the tuner based on mode control information, wherein the active mode voltage supply circuit is operative to provide a first current capacity, and
• a passive mode voltage supply circuit operatively coupled to the active mode voltage supply circuit and that is operative to supply the voltage when the active mode voltage supply circuit is not supplying the voltage, wherein the passive mode voltage supply circuit is operative to provide a second current capacity that is less than the first current capacity.

An apparatus comprising:

• an input circuit that is operative to generate a baseband signal;
• a modulation circuit that comprises:
• a voltage controlled oscillator (VCO),
• a tuner that communicates with the VCO and that is operative to adjust oscillations of the VCO to a predetermined frequency, and
• a dual mode voltage supply circuit that comprises:
• an active mode voltage supply circuit that is selectively operative to supply a voltage to the tuner based on mode control information, wherein the active mode voltage supply circuit is operative to provide a first current capacity, and
• a passive mode voltage supply circuit operatively coupled to the active mode voltage supply circuit and that is operative to supply the voltage when the active mode voltage supply circuit is not supplying the voltage, wherein the passive mode voltage supply circuit is operative to provide a second current capacity that is less than the first current capacity,
• wherein the modulation circuit is operative to receive the baseband signal and generate a modulated signal based thereon.