Switch control voltage generator, bandgap reference generator, and method for generating switch voltage thereof

A switch control voltage generator, comprising:

• a first current source connected to a power supply voltage, the first current source configured to transfer a first reference current having a constant level with respect to temperature to a first node;
• a first resistor connected between the first node and ground;
• a second resistor having one end connected to the first node;
• a diode-connected bipolar junction transistor connected between another end of the second resistor and ground;
• and
• a second current source connected to the power supply voltage, the second current source configured to apply a second reference current to an emitter terminal of the diode-connected bipolar junction transistor,
• wherein the first resistor, the second resistor and the diode-connected bipolar junction transistor are configured to generate an adaptive switch level voltage at the first node, and a magnitude of a slope and an offset of the adaptive switch level voltage with respect to temperature being adjustable based on resistances of the first and second resistors.

A method for generating a switch voltage for switching of a bandgap reference generator, comprising:

• generating a reference current based on a reference voltage provided from the bandgap reference generator;
• generating an adaptive switch level voltage by distributing the reference current to a first path and a second path, the first path including a first resistor, and the second path including a second resistor and a diode-connected bipolar junction transistor connected in series;
• generating a switch control signal for controlling switch elements of the bandgap reference generator based on the adaptive switch level voltage;
• and
• applying the switch control signal to the switch elements of the bandgap reference generator.