US 11,942,909 B2
Amplifier and amplification method
Limin Yu, Guangzhou (CN); Yongle Li, Guangzhou (CN); and Cheng Xu, Guangzhou (CN)
Assigned to SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD., Guangzhou (CN)
Filed by SMARTER MICROELECTRONICS (GUANG ZHOU) CO., LTD., Guangzhou (CN)
Filed on Dec. 26, 2020, as Appl. No. 17/134,391.
Application 17/134,391 is a continuation of application No. PCT/CN2020/114066, filed on Sep. 8, 2020.
Claims priority of application No. 202010124257.3 (CN), filed on Feb. 27, 2020.
Prior Publication US 2021/0273617 A1, Sep. 2, 2021
Int. Cl. H03F 1/34 (2006.01); H03F 1/02 (2006.01); H03F 3/24 (2006.01); H04W 84/04 (2009.01)
CPC H03F 3/245 (2013.01) [H03F 1/0211 (2013.01); H03F 1/34 (2013.01); H03F 2200/165 (2013.01); H04W 84/042 (2013.01)] 13 Claims
OG exemplary drawing
 
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.