Circuit for generating differential reference voltages, circuit for detecting signal peak, and electronic device

A circuit for generating differential reference voltages, comprising:

• a common-mode extraction circuit, wherein a first input terminal of the common-mode extraction circuit is configured to receive a first differential signal, a second input terminal of the common-mode extraction circuit is configured to receive a second differential signal, and an output terminal of the common-mode extraction circuit serves as a first output terminal of the circuit for generating differential reference voltages;
• a first operational amplifier, wherein a non-inverting input terminal of the first operational amplifier is connected to the output terminal of the common-mode extraction circuit;
• a main control switch, wherein a control terminal of the main control switch is connected to an output terminal of the first operational amplifier, and an input terminal of the main control switch is connected to a first power source;
• a first voltage dividing resistor, wherein a first terminal of the first voltage dividing resistor is connected to an output terminal of the main control switch, and a second terminal of the first voltage dividing resistor is connected to an inverting input terminal of the first operational amplifier, the first terminal of the first voltage dividing resistor serves as a second output terminal of the circuit for generating differential reference voltages, and the second terminal of the first voltage dividing resistor serves as a third output terminal of the circuit for generating differential reference voltages;
• a second voltage dividing resistor, wherein a first terminal of the second voltage dividing resistor is connected to the second terminal of the first voltage dividing resistor, and a second terminal of the second voltage dividing resistor serves a fourth output terminal of the circuit for generating differential reference voltages;
• and
• a first direct current power source, wherein a first terminal of the first direct current power source is connected to a second terminal of the second voltage dividing resistor, a second terminal of the first direct current power source is grounded, and a current supplied by the first direct current power source is adjustable.