Echo Cancellation Circuit
An echo cancellation and circuit technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve problems affecting circuit performance, echo cancellation effect limitations, etc., to achieve the best echo cancellation effect and improve flexibility
Active Publication Date: 2022-06-21
REALTEK SEMICON CORP
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Problems solved by technology
[0004] However, because circuits have different loads and operating frequencies in different applications, and the echo Ioe is closely related to the load and operating frequency, if the echo cancellation circuit 140 cannot adjust the echo cancellation signal Iec according to various applications, the effect of echo cancellation will be limited, which in turn affects the performance of the circuit
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[0046] The technical terms in the following description refer to the common terms in the technical field. If some terms are described or defined in this specification, the interpretation of this part of terms shall be subject to the descriptions or definitions in this specification.
[0047] The present disclosure includes echo cancellation circuits. Since some of the components included in the echo cancellation circuit of the present invention may be known components individually, the details of the known components will be omitted in the following description without affecting the full disclosure and practicability of the device invention. .
[0048] figure 2It is a circuit diagram of an embodiment of the echo cancellation circuit of the present invention. The electronic device 200 includes a transmission circuit 210, a reception circuit 220 (including 220-p and 220-n), a coupling circuit 230, and an echo cancellation circuit 240 (including 240-p and 240-n). The coupling...
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An echo canceling circuit is coupled to a transmission circuit and a reception circuit of an electronic device, and the transmission circuit includes an output transistor. The echo cancellation circuit includes a first transistor, a second transistor, a first resistor-capacitor network, a second resistor-capacitor network, a first resistor, and a second resistor. The first transistor has a first gate, a first drain and a first source, wherein the first drain is coupled to the receiving circuit. The second transistor has a second gate, a second drain and a second source, wherein the second drain is coupled to the receiving circuit. The first resistor-capacitor network is coupled between the gate of the output transistor and the first gate. The second resistor-capacitor network is coupled between the first gate and the second gate. One end of the first resistor is coupled to the first source, and the other end is coupled to the reference voltage. One end of the second resistor is coupled to the second source, and the other end is coupled to the reference voltage.
Description
technical field [0001] The present invention relates to electronic devices, and more particularly, to echo cancellation circuits for electronic devices. Background technique [0002] Echo cancellation is often used in electronic circuits to eliminate the signal reflected from the transmitting end of the circuit to the receiving end of the circuit to avoid interference at the receiving end. figure 1 A functional block diagram of an electronic device including an echo cancellation circuit. The electronic device 100 includes a transmission circuit 110, a reception circuit 120 (including 120-p and 120-n), a coupling circuit 130, and an echo cancellation circuit 140 (including 140-p and 140-n). The output signal Io (including the differential output signals Io-p and Io-n) generated by the transmission circuit 110 is output to other electronic devices or circuits (not shown) through the coupling circuit 130 , and the receiving circuit 120 passes through the coupling circuit 130 ...
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IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor吴健铭张佳琳
OwnerREALTEK SEMICON CORP