Receiver with function to adjust local frequency following reception frequency

A receiver, comprising:

• a voltage controlled reference oscillator which produces a reference frequency signal;
• a phase locked loop circuit for functioning as a first local oscillator including a voltage controlled oscillator which produces a first local signal based on the reference frequency signal;
• a first mixer which mixes a reception signal with the first local signal and produces a first intermediate frequency signal;
• a second local oscillator which produces a second local signal;
• a second mixer which mixes the first intermediate frequency signal with the second local signal and produces a second intermediate frequency signal;
• a first counter which counts a frequency of the second local signal;
• a second counter which counts a frequency of the second intermediate frequency signal;
• a first digital-to-analog converter for supplying a control voltage to the voltage controlled reference oscillator;
• means for storing information representing a relationship between frequency deviations of the voltage controlled reference oscillator and corresponding voltage changes to said control voltage for compensating the frequency deviations, the relationship being represented as a first linear expression;
• means for calculating a frequency deviation of the voltage controlled reference oscillator based on count values of the first and the second counters;
• and
• means for supplying control data to the first digital to analog converter and for changing the control data based on the information so as to compensate the frequency deviation when the frequency deviation of the voltage controlled reference oscillator is not within a permissible range, the control data corresponding to the control voltage to be supplied to the voltage controlled reference oscillator.