Adaptive phase-shifted synchronization clock generation circuit and method for generating phase-shifted synchronization clock

An adaptive phase-shifted synchronization clock generation circuit, comprising:

• a first current source generating a current which flows through a node to generate a node voltage on the node;
• an inverse-proportional voltage generator coupled to the node for generating a voltage which is inverse-proportional to the node voltage;
• a ramp generator receiving a synchronization input signal and generating a ramp signal;
• a first comparator comparing the inverse-proportional voltage to the ramp signal;
• and
• a pulse generator for generating a clock signal according to an output from the first comparator, wherein the inverse-proportional voltage generator comprises:
• a voltage-to-current converter circuit converting the voltage on the node to a current signal;
• a first variable resistor which generates a voltage signal as the current signal flows therethrough;
• a second variable resistor having a resistance capable of being adjusted in synchronization with a resistance of the first variable resistor;
• an error amplifier comparing a voltage signal generated on the first variable resistor with a reference voltage;
• a resistance adjustment circuit for synchronously adjusting the resistances of the first and second variable resistor according to the output of the error amplifier;
• and
• a second current source generating a current which flows through the second resistor to generate the inverse-proportional voltage.