Integrated circuit and phase locked loop circuit including the same

An integrated circuit configured to receive a control voltage and convert the control voltage into an oscillator control current, the integrated circuit comprising:

• a Process Aware Reference (PAR) circuit configured to output a compensation current that compensates for at least one of a process variation, a power voltage variation, or a temperature variation of the integrated circuit;
• an amplifier comprising an inverting input terminal that is configured to receive the control voltage, and a non-inverting input terminal shorted to a first node;
• a first transistor configured to receive an output voltage of the amplifier as a gate voltage, and has a first end electrically connected to a power source supply terminal, and a second end electrically connected to the first node;
• a resistor which is electrically connected in series between the first node and a power source ground terminal;
• a second transistor which is electrically connected in series between a power source terminal of the amplifier and the power source ground terminal;
• a third transistor which is electrically connected in series between the PAR circuit and the power source ground terminal, and is a current mirror with the second transistor;
• and
• a current digital-analog converter (IDAC) circuit which is configured to convert a reference current through the resistor into the oscillator control current in accordance with an IDAC code.

A phase locked loop circuit comprising:

• a loop filter configured to output a control voltage based on an amount of charges stored in a capacitor;
• a voltage-current converter configured to receive the control voltage, configured to convert the control voltage into an oscillator control current, and configured to output the oscillator control current;
• and
• an oscillator configured to output an output frequency signal based on the oscillator control current,
• wherein the voltage-current converter comprises:
• a Process Aware Reference (PAR) circuit configured to output a compensation current that compensates for at least one of a process variation, a power voltage variation, or a temperature variation of the voltage-current converter;
• an amplifier which includes a power source terminal that is configured to output an amplifier current that determines an amplifier gain, an inverting input terminal that is configured to receive the control voltage, and a non-inverting input terminal that is configured to receive an amplifier voltage based on the amplifier gain;
• and
• a current digital-analog converter (IDAC) circuit configured to convert a reference current generated based on the amplifier voltage into the oscillator control current in accordance with an IDAC code,
• wherein the PAR circuit is configured to output the compensation current to adjust the amplifier current.