Pulse width modulation signal generation circuit and lamp control system including the same

A pulse width modulation (PWM) signal generation circuit comprising:

• a pulse period control circuit configured to:
• control charging and discharging of a first capacitor;
• and
• generate a first output signal related to a first number of times of charging of the first capacitor;
• a pulse width control circuit configured to:
• control charging and discharging of a second capacitor;
• and
• generate a second output signal related to a second number of times of charging of the second capacitor;
• a control logic circuit configured to:
• determine a period of a PWM signal based on the first output signal;
• determine a pulse width of the PWM signal based on the second output signal;
• and
• output the PWM signal having the period and the pulse width,
• a first amplifier configured to amplify a difference between a third reference voltage applied to an inverting terminal and a voltage applied to a non-inverting terminal to generate a first charging control signal for the charging of the first capacitor;
• and
• a first current supply circuit configured to generate a first current in response to the first charging control signal and feed the first current back to the non-inverting terminal.