Method and apparatus for modulation of a voltage controlled oscillator

An apparatus for linearizing a frequency deviation response for a voltage controlled oscillator, the apparatus comprising:

• a. oscillator means having a tuning input for receiving a tuning control signal for adjusting a center frequency for the oscillator means and a modulation input for receiving a modulation control signal for modulating an output signal formed by the oscillator means;
• and
• b. means for forming the modulating control signal based upon the tuning control signal and a content-carrying signal wherein the means for forming is coupled to the oscillator means.

An apparatus for linearizing a frequency deviation response for a voltage controlled oscillator, the apparatus comprising:

• a. a voltage-controlled oscillator having a tuning input to receive a tuning control signal to adjust a center frequency for the voltage-controlled oscillator and a modulation input to receive a modulation control signal to modulate an output signal formed by the voltage-controlled oscillator;
• and
• b. a correction circuit coupled to the voltage-controlled oscillator to receive the tuning control signal and a content-carrying signal to form the modulating control signal such that a frequency deviation caused by an incremental change in the modulating control signal is substantially constant despite changes in the tuning control voltage.

A method of linearizing a frequency deviation response in a voltage controlled oscillator, the method comprising:

• a. providing an oscillator means having a tuning input for receiving a tuning control signal for adjusting a center frequency for the oscillator means and a modulation input for receiving a modulation control signal for modulating an output signal formed by the oscillator means;
• and
• b. forming the modulating control signal based upon the tuning control signal and a content-carrying signal.