Control circuit and delay circuit

A delay circuit, comprising a delay unit and a control circuit,

• wherein the control circuit comprises a control unit, a first feedback unit, and a second feedback unit,
• the first feedback unit is configured to output a first feedback signal according to a voltage of the control unit and a first reference voltage;
• a first terminal of the first feedback unit is connected to a first terminal of the control unit, a second terminal of the first feedback unit serves as an input terminal of the first reference voltage, and an output terminal of the first feedback unit is connected to a second terminal of the control unit and a first terminal of the second feedback unit;
• the second feedback unit is configured to output a second feedback signal according to an output voltage of the first feedback unit and a second reference voltage;
• a second terminal of the second feedback unit serves as an input terminal of the second reference voltage, and an output terminal of the second feedback unit is connected to a third terminal of the control unit;
• the control unit is configured to adjust a voltage of the second terminal of the control unit according to the first feedback signal and adjust a voltage of the third terminal of the control unit according to the second feedback signal to make a value by which a current of the control unit changes be within a first range, wherein the current of the control unit changes along with a change of a first parameter;
• the first parameter comprises at least one of manufacturing process parameters, power supply voltage, or working temperature of the control circuit;
• a fourth terminal of the control unit is connected to a first power supply end and a fifth terminal of the control unit is connected to a negative power supply end, or the fourth terminal of the control unit is connected to a second power supply end and the fifth terminal of the control unit is connected to ground,
• wherein the second terminal of the control unit is connected to a first terminal of the delay unit, the third terminal of the control unit is connected to a second terminal of the delay unit, the control unit is configured to control a value by which at least one of a rising edge delay time or a falling edge delay time of the delay unit changes to be within the first range, wherein the at least one of the rising edge delay time or the falling edge delay time of the delay unit changes along with the change of the first parameter.