Control circuit and voltage output circuit

A voltage output circuit comprising:

• an operational amplifier circuit having an output node;
• and
• a control circuit configured to control a state of the output node of the operational amplifier circuit, wherein
• the operational amplifier circuit includes:
• a first current source configured to receive a power supply voltage and a bias voltage, and to generate a first current according to the power supply voltage and the bias voltage,
• a first differential pair configured to receive a pair of input voltages, and to allow the first current to flow therethrough, and
• a first output circuit configured to apply an output voltage according to the input voltages, to the output node, in response to the power supply voltage exceeding a first level;
• the control circuit includes:
• a second current source configured to receive the power supply voltage and the bias voltage, and to generate a second current according to the power supply voltage and the bias voltage,
• a second differential pair configured to receive the input voltages, and to allow the second current to flow therethrough, and
• an output control circuit coupled to the second differential pair, the output control circuit being configured to control a state of the output node;
• and
• the output control circuit is configured to cause a level at the output node to be a predetermined level, until a level of the power supply voltage reaches the first level, and
• cause the output voltage to be applied to the output node, in response to the level of the power supply voltage exceeding the first level.