Patent ID: 11942909
Assignee: SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD.
Field: Basic communication processes (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. An amplifier, comprising:
an input circuit, an amplification circuit and at least two feedback circuits;
wherein
the input circuit is connected with an input end of the amplification circuit; an output end of the amplification circuit is connected with a first end of each of the feedback circuits respectively; and a second end of each of the feedback circuits is connected with the input circuit respectively;
the input circuit is configured to receive an input signal and a feedback signal; the amplification circuit is configured to amplify the input signal and the feedback signal to obtain an amplified signal;
the feedback signal is fed back to the input circuit by feeding back at least a part of the amplified signal through one target feedback circuit of the at least two feedback circuits
depending on a type of the input signal;
the input signal comprises a first type and a second type;
the input signal of the second type comprises a first subtype and a second subtype;
in a case that the input signal is a signal of the first type or the first subtype, the one target feedback circuit is a first feedback circuit of the at least two feedback circuits;
in a case that the input signal is a signal of the second subtype, the one target feedback circuit is a second feedback circuit of the at least two feedback circuits;
the first feedback circuit comprises a first capacitive element, a first resistor and a second resistor;
a first end of the first capacitive element is connected with the input end of the amplification circuit;
a second end of the first capacitive element is connected with one end of the first resistor; the other end of the first resistor is connected with one end of the second resistor; and the other end of the second resistor is connected with the output end of the amplification circuit;
in a case that the input signal is the signal of the first type or the first subtype, at least a part of the amplified signal is fed back to the input circuit through the second resistor, the first resistor and the first capacitive element sequentially;
the second feedback circuit comprises a first capacitive element, a first resistor and a turn-on circuit; wherein a first end of the first capacitive element is connected with the input end of the amplification circuit; a second end of the first capacitive element is connected with one end of the first resistor; the other end of the first resistor is connected with one end of the turn-on circuit; and the other end of the turn-on circuit is connected with the output end of the amplification circuit; and
in a case that the input signal is the signal of the second subtype, at least a part of the amplified signal is fed back to the input circuit through the turn-on circuit, the first resistor and the first capacitive element sequentially.